Lean Exam
Le Lean Six Sigma est, comme son nom l'indique, une démarche combinant la méthode Lean Management et la méthode Six Sigma visant à une amélioration de la qualité et de l'efficacité des processus. La méthode a été appliquée à des processus industriels avant d’être élargie à tous les types de processus, notamment administratifs, logistiques, commerciaux et d'économie d'énergie.
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The Lean Six Sigma Yellow Belt Examination Mock Exam V1.1
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Question 1 sur 50
1. Question
Which is a principle of Lean?
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Question 2 sur 50
2. Question
Which is a purpose and use of data visualization?
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Question 3 sur 50
3. Question
Which element is identified in a problem statement?
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Question 4 sur 50
4. Question
What method aims to provide a rapid and efficient way of converting a manufacturing process from producing the current product to producing a different product?
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Question 5 sur 50
5. Question
Which is a purpose of Short Interval Management (SIM)?
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Question 6 sur 50
6. Question
What step in the 5S methodology requires that safety equipment and emergency procedures are made clearly visible for all?
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Question 7 sur 50
7. Question
How are the inputs defined in the SIPOC technique?
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Question 8 sur 50
8. Question
What metrics are considered first when deciding ’What to Measure’ in a process?
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Question 9 sur 50
9. Question
What type of variation is caused by human error or a change in environmental factors, resulting in a non-random distribution of output?
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Question 10 sur 50
10. Question
What type of data is sometimes called variable data?
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Question 11 sur 50
11. Question
Why is the ‘One-Factor-at-a-Time’ (OFAT) approach inferior to the ‘Design of Experiments’ (DOE) approach?
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Question 12 sur 50
12. Question
Which benefit is gained by implementing ‘Flow’?
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Question 13 sur 50
13. Question
What term is given to represent the maximum value minus the minimum value in a data set?
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Question 14 sur 50
14. Question
What is the purpose of a Bar chart?
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Question 15 sur 50
15. Question
Why is the Value Stream Mapping (Current State) technique used?
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Question 16 sur 50
16. Question
Which is a focus of Operational Excellence?
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Question 17 sur 50
17. Question
Which statement describes a defective product?
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Question 18 sur 50
18. Question
Which benefit is achieved from process mapping?
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Question 19 sur 50
19. Question
What quality activity is focused on preventing defects during production, rather than looking for defects in the end product?
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Question 20 sur 50
20. Question
Which of the following are examples of continuous data?
1. Number of features
2. Size in centimeters
3. Weight in kilograms
4. Pressure per square centimeterExact
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Question 21 sur 50
21. Question
Which method is NOT used for understanding customer requirements?
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Question 22 sur 50
22. Question
What is the outcome when designing the optimal Value Stream?
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Question 23 sur 50
23. Question
Which is a use of a concentration diagram?
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Question 24 sur 50
24. Question
What company developed the ‘Lean thought process’?
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Question 25 sur 50
25. Question
Which of the following are outcomes of implementing the ‘Pull’ principle?
1. Semi-finished products
2. Items made as they are needed
3. Minimal materials stocked
4. Reduced fluctuationExact
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Question 26 sur 50
26. Question
Which of the following are common brainstorming techniques used when brainstorming causes of effects?
1. Tree diagram
2. Clustering items together
3. 5S steps
4. 6 MsExact
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Question 27 sur 50
27. Question
Which of the following steps are used to construct a Failure Mode and Effect Analysis (FMEA)?
1. Rate the impact of the negative effect on the customer
2. Multiply the probability with the impact, and the potential to miss it
3. Prepare a plan to respond to the negative effect after it has occurred
4. Assess the chance of a problem occurring without it being noticedExact
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Question 28 sur 50
28. Question
Which aspect of an organization is MOST likely to make a process of change difficult?
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Question 29 sur 50
29. Question
Which is NOT one of the eight pillars within the TPM ‘House of Quality’?
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Question 30 sur 50
30. Question
What is the primary goal of the 5-Whys technique?
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Question 31 sur 50
31. Question
What is the final aim of the Cause and Effect Matrix used in decision making?
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Question 32 sur 50
32. Question
Which of the following elements should be included in a Control plan?
1. Failure Mode and Effect Analysis
2. Out-of-Control Action Plan
3. Product and process characteristics
4. Actions to minimise potential failuresExact
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Question 33 sur 50
33. Question
Which type of correlation is NOT a recognised relationship?
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Question 34 sur 50
34. Question
Which is an important requirement of the data collected when sampling data?
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Question 35 sur 50
35. Question
Which type of ‘Customer Waste’ is MOST likely to be the cause of an end product that fails to meet the customer’s expectations?
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Question 36 sur 50
36. Question
What is a Statistical Process Control (SPC) chart used for?
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Question 37 sur 50
37. Question
Which is the philosophy shared by Lean and Six Sigma?
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Question 38 sur 50
38. Question
What is the principle of ‘Jidoka’?
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Question 39 sur 50
39. Question
Which is the basis of hypothesis testing?
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Question 40 sur 50
40. Question
What is ‘Little’s’ formula for calculating Average Lead Time?
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Question 41 sur 50
41. Question
What Lean Six Sigma term is used to describe over-production, defects, inventory and movement?
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Question 42 sur 50
42. Question
Which is a statement about a Kaizen event?
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Question 43 sur 50
43. Question
Which is a step in the Global 8D problem solving process?
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Question 44 sur 50
44. Question
Which documentation describes how to accomplish a specific task within a Quality Management System (QMS)?
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Question 45 sur 50
45. Question
Which activity does NOT belong to the Plan step in the PDCA approach?
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Question 46 sur 50
46. Question
Which is a Value Adding Activity?
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Question 47 sur 50
47. Question
What is the Process Capability index (Cp) formula where USL is the Upper Specification Limit, LSL is the Lower Specification Limit and S is the standard deviation?
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Question 48 sur 50
48. Question
Which is NOT an example of Visual Management?
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Question 49 sur 50
49. Question
What role is a process improvement expert?
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Question 50 sur 50
50. Question
What is a purpose of Volume leveling in Lean manufacturing?
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The Lean Six Sigma Orange Belt Examination Mock Exam V1.1
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Question 1 sur 50
1. Question
Which description outlines a purpose of a ‘Project Charter’?
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Question 2 sur 50
2. Question
What measure is used to evaluate the utilization of a manufacturing operation in terms of availability, performance and quality?
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Question 3 sur 50
3. Question
Why is visualization of data useful?
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Question 4 sur 50
4. Question
A company employs 5 members of staff who work 36 productive hours per 5-day week, producing 360 completed units between them. The Sales Manager forecasts that demand is going to increase by 50%. How many additional members of staff does the company need to employ to ensure that the Average Lead Time will be
maintained?Exact
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Question 5 sur 50
5. Question
Which approach to change reflects a traditional management style where objectives are established by senior staff as well as guidelines, information timing and budgets?
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Question 6 sur 50
6. Question
Repeated failures of an expensive new water pump have caused costly shut downs resulting in lost profit to the organization. The failures were caused by a leak,
which resulted from a single mechanical seal. The single seal was specified because it was less expensive than the double seal option. The project team were unaware that a single seal might prove insufficient in this particular pumping process. No-one sought advice about the most effective design criteria for the process and equipment requirements. Guidelines for the purchase of capital equipment do not call for a reliability assessment. The project team were tasked to control costs and to complete the project quickly in order to get the product to market sooner. What is the root cause of this problem?Exact
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Question 7 sur 50
7. Question
What term is given to the discrete probability distribution of the number of successes in a sequence of Yes/No experiment?
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Question 8 sur 50
8. Question
Which statement BEST describes a Critical to Quality (CTQ) measure?
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Question 9 sur 50
9. Question
Quality control issued a ‘non-conformance’ due to an incorrect bolt pattern (34 holes drilled instead of 36). The causes were a combination of engineering oversight and a lack of quality checking by the machinist. What should be documented in the problem statement when attempting to resolve this issue?
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Question 10 sur 50
10. Question
Which is the MOST likely reason to use a ‘transportation / Spaghetti (workflow) Diagram’?
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Question 11 sur 50
11. Question
Which feature is NOT shared by both Lean and Six Sigma?
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Question 12 sur 50
12. Question
Which of the following represents a good measurement system?
1. Process being measured is stable
2. Measuring instrument is regularly calibrated
3. Minimal variation caused by different people measuring
4. Measurement procedure is clear and usedExact
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Question 13 sur 50
13. Question
A two-stage brainstorm session is being facilitated with a group of production line staff to identify potential reasons for a continued increase in the number of defects from a production line. What actions should be taken to support brainstorming techniques?
1. Invite the production manager to lead the discussion
2. Ask staff to note their suspected reasons individually
3. Sort reasons into common groups and expand ideas
4. Highlight those reasons that need further investigationExact
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Question 14 sur 50
14. Question
An analyst has gathered data from a population to gain an understanding of whether there is any relationship between a person’s age and their level of income. Calculating the Pearson Correlation Coefficient results in a value of 0.20. Which conclusion CANNOT be drawn about the relationship between a person’s age and their level of income?
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Question 15 sur 50
15. Question
Which customer group is MOST likely to voice requirements about operating hours, health and safety and working conditions?
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Question 16 sur 50
16. Question
What action represents a Type I Error in a hypothesis test?
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Question 17 sur 50
17. Question
What company first developed ‘Lean Thinking’ or ‘Lean Management’?
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Question 18 sur 50
18. Question
What does Value Stream Mapping (VSM) aim to achieve?
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Question 19 sur 50
19. Question
Regression Analysis is carried out on the sales of a product in relation to temperature.
Which observations can be determined about the relationship between these two factors?
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Question 20 sur 50
20. Question
The temperature in a computer server room was reaching an uncomfortable level. A technical engineer, working in this room, decided to open the fire door to let some air in. The sudden rush of air forced the technical engineer backwards, landing on the emergency power stop button, cutting all power to the servers. Which activity would NOT have helped to prevent this problem in the workplace?
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Question 21 sur 50
21. Question
Which observation indicates the presence of a constraint in a process?
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Question 22 sur 50
22. Question
What level of Lean Six Sigma ‘Belt’ is an expert in executing improvement projects which involve more than one department or organization?
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Question 23 sur 50
23. Question
When searching for a replacement part in a mountain of boxes, a member of a production team has found several boxes of other parts that have been stored in the
warehouse area for months. What two types of operational Waste are evident in this situation?Exact
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Question 24 sur 50
24. Question
In which types of organizations is Operational Excellence applicable?
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Question 25 sur 50
25. Question
When using a Go/No go Gage to measure a critical product dimension, what will the result directly indicate?
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Question 26 sur 50
26. Question
If the current operational availability of an automated assembly machine is not enough to meet an increase in customer demand, what is the BEST way to improve the machine’s availability?
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Question 27 sur 50
27. Question
Which of the following reasons explain why Design of Experiments (DOE) would be used?
1. Factors can be varied simultaneously
2. Trials can be performed quickly
3. One influencing factor is changed at a time
4. Connections between factors can be revealedExact
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Question 28 sur 50
28. Question
What type of quality activity is carried out on the final product to ensure it is fit for purpose when delivered to the customer?
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Question 29 sur 50
29. Question
Which describes a ‘systematic’ approach to collecting a representative sample of population data?
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Question 30 sur 50
30. Question
How will a Future State Value Stream Map differ to the Current State Value Stream Map of the same process?
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Question 31 sur 50
31. Question
Why are review sessions scheduled between each of the five ‘Define, Measure, Analyze, Improve and Control’ (DMAIC) phases of a Lean Six Sigma project?
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Question 32 sur 50
32. Question
If a process has a Capability Index of Cp = 1 for a specific parameter, what percentage of units produced fit within the tolerance range?
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Question 33 sur 50
33. Question
A Kaizen Blitz is being carried out in a small retail outlet. What is the first action that should be taken by the facilitator?
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Question 34 sur 50
34. Question
The weights of 100 units have the above normal distribution. How many standard deviations is 1.85 away from the mean?
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Question 35 sur 50
35. Question
What is implemented last in a process improvement project when following the ‘Define, Measure, Analyze, Improve and Control’ (DMAIC) roadmap?
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Question 36 sur 50
36. Question
What needs to be reduced if productivity is less than demand?
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Question 37 sur 50
37. Question
What type of variation suggests that a process is ‘Out-of-Control’?
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Question 38 sur 50
38. Question
Which objective does NOT relate to bringing a process into a state of statistical control?
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Question 39 sur 50
39. Question
Which attribute is required of all Lean Six Sigma team members?
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Question 40 sur 50
40. Question
Which conclusion can be determined about the amount of sleep needed per day by age?
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Question 41 sur 50
41. Question
A pharmaceutical company has recently removed a number of surplus items from a laboratory, clearing some much-needed space. Keen to utilize this new space, technicians have begun to store various materials in this area. Three separate employees have since been taken ill due to contaminated surfaces. Which step in the 5S technique would determine where each item should be stored?
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Question 42 sur 50
42. Question
What concept is being applied in the Control phase of a Lean Six Sigma project, when a Belt identifies key metrics that can be monitored and analyzed to indicate when a process has an unusual drift or variation?
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Question 43 sur 50
43. Question
Which of the following statements are about the use of ‘Pull’ production?
1. Items are made to order
2. Items are ready earlier than required
3. Raw materials are ordered as needed
4. Customer demand drives productionExact
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Question 44 sur 50
44. Question
Which is a use of Critical to Quality (CTQ) measures in a Cause & Effect Matrix?
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Question 45 sur 50
45. Question
Traditional printing involves converting words into a printable form, called a printing plate, which is covered in ink and then pressed against pieces of paper. The machine into which the plate is installed is called a printing press. To print a whole book several plates will be installed in succession into the press. Which step in the printing process is LEAST likely to require the press to be stopped before a changeover of the plate can be conducted?
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Question 46 sur 50
46. Question
Which of the following are Six Sigma metrics?
1. Precision to tolerance ratio
2. Rolled Throughput Yield
3. Proportion of defective products
4. Process Capability indexExact
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Question 47 sur 50
47. Question
Which characteristic of a company is MOST likely to influence the success of a Lean Six Sigma project?
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Question 48 sur 50
48. Question
‘Which is a purpose of the Eight Disciplines (8D) Problem solving method?
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Question 49 sur 50
49. Question
What is the purpose of calculating Risk Priority Numbers (RPN) in a Failure Mode and Effects Analysis (FMEA)?
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Question 50 sur 50
50. Question
What document is formally required in a quality system to describe the sequence of activities together with necessary tools and the timings for how long each item should take?
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The Lean Six Sigma Green Belt Examination Mock Exam V1.1
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Question 1 sur 60
1. Question
A study is to be carried out on a litter of puppies.
Information about the first puppy has been captured:
The analyst has stated that statistics on the appearance and personalities of the puppies cannot be measured, because this type of data cannot be counted or measured.
Is this statement correct?
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Question 2 sur 60
2. Question
Customers at the self-service checkouts of a supermarket must scan each purchase and put it in a bag in the ‘bagging area’.
Often the customers receive the error message ‘please put the item in the bag’, because they cannot open the plastic bags quickly enough.
In the DMAIC roadmap, which of the following is determined before the Define phase Gate Review?
1. The customer’s experience when opening a plastic bag takes longer than the checkout allows
2. Which parts of the scanning, bagging and weighing process are involved
3. The average time to open a bag; the average time taken for the error message to appear
4. Who has the most influence out of the customer, bag supplier and software supplierExact
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Question 3 sur 60
3. Question
A farmer is seeking ways to improve the farm’s existing process for feeding cattle, so gathers information to create a SIPOC diagram.
Which of the following entries and reasons are appropriate on a SIPOC diagram?
1. ‘Feed storage container’, because this affects the quality of the feed
2. ‘Collect feed and fill troughs’, because this is part of the process
3. ‘Cattle fertilized field’ , because this is an output of the process
4. ‘Fed cattle’, because these are an input to the processExact
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Question 4 sur 60
4. Question
According to the KANO model, which performance feature of a product or service is MOST likely to satisfy a customer’s expectations?
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Question 5 sur 60
5. Question
An egg distributor wants to monitor the number of eggs damaged or broken in transit. Each crate holds 288 eggs. Each shipment contains a different number of crates.
The number of eggs broken in transit has been counted. Because of the different size of each shipment, the control limits vary. On average 1 broken egg was found in each shipment.
What type of chart would be appropriate to capture this information?
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Question 6 sur 60
6. Question
A pharmaceutical company has recently removed a number of surplus items from a laboratory, clearing some much-needed space. Keen to utilize this new space, technicians have begun to store various materials in this area. Three separate employees have since been taken ill due to contaminated surfaces.
Which step in the 5S technique would determine where each item should be stored?
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Question 7 sur 60
7. Question
After returning from a two-week vacation a manager reviewed the Xbar and R charts that were maintained during the manager’s absence. One of the Xbar charts shows the last 50 points to be very near the centre line. In fact, they all seem to be within about one sigma of the centre line.
What is the BEST explanation for this occurrence?
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Question 8 sur 60
8. Question
Which risk rating from a Failure Modes and Effects Analysis (FMEA) indicates the need to develop actions to reduce the ‘potential effect(s) of failure’?
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Question 9 sur 60
9. Question
Which is NOT a perspective described by the Balanced Scorecard (BSC) to develop metrics, collect data and analyze it?
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Question 10 sur 60
10. Question
Why might a project team conduct a ‘stakeholder analysis’?
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Question 11 sur 60
11. Question
A production manager has asked a member of the production team to present a summary of the team’s performance over the past three months.
The data presented was clear and concise, and delivered in a professional manner.
However, the data showed the team’s performance to be lower than expected, and that one member in particular had failed to meet several of the performance targets set.
Which response from the production manager would NOT be appropriate?
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Question 12 sur 60
12. Question
A scaffolding company is replacing its existing steel bracketed scaffold system with a new ‘Snapit’ system. They want their new system to be light and easy to transport, and yet be
as strong as the old system. They would like to reduce the time it takes to erect and dismantle the scaffold towers on site, and yet maintain the same level of stability as the old system.How should the safety requirement be captured for the external Critical to Quality (CTQ)?
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Question 13 sur 60
13. Question
Which feature is NOT shared by both Lean and Six Sigma?
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Question 14 sur 60
14. Question
A process produces the following statistics:
What is the Rolled Throughput Yield (RTY) for this process?
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Question 15 sur 60
15. Question
An engineer samples 100 parts from a production process. 20% defective parts are expected.
The engineer plans to use the normal distribution to calculate a confidence interval for the mean proportion defectives.Why is this choice allowed?
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Question 16 sur 60
16. Question
Which attribute is required of all Lean Six Sigma team members?
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Question 17 sur 60
17. Question
project team at a Pizzeria restaurant must create a current-state value stream
map to improve their pizza-making process. The project leader has gathered a team that
includes the wait staff, kitchen staff and management to ensure that everyone who is involved in the process is represented. The team create a high-level map of the processb by gathering information about each step, including activities, cycle times, defects and inventory; some of which are given in the table below.The scope of the pizza-making process value stream is from the time the customer places an order to the time that the pizza is delivered to the customer’s table (in
minutes).Which action would reduce the Cycle Time?
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Question 18 sur 60
18. Question
A two-stage brainstorm session is being facilitated with a group of production line staff to identify potential reasons for a continued increase in the number of defects from a production line.
What actions should be taken to support brainstorming techniques?
1. Invite the production manager to lead the discussion
2. Ask staff to note their suspected reasons individually
3. Sort reasons into common groups and expand ideas
4. Highlight those reasons that need further investigationExact
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Question 19 sur 60
19. Question
What is the Range (R) of the data set: 2, 5, 6, 9, 8, 5, 7?
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Question 20 sur 60
20. Question
The Pareto chart below shows the paint defects from an automotive assembly plant:
The assembly plant manager has decided that there is no question as to which problem needs to be addressed first, the ‘Dirt’ defect.
Is the assembly plant manager correct in this conclusion?
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Question 21 sur 60
21. Question
What is the name of the Six Sigma roadmap that is used for design rather than improving the manufacturing of a product?
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Question 22 sur 60
22. Question
If the current operational availability of an automated assembly machine is not enough to meet an increase in customer demand, what is the BEST way to improve the machine’s availability?
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Question 23 sur 60
23. Question
A hypermarket needs to link the products it displays on the shelves to the inventory in the warehouse and then to the supplier. The following steps have been introduced:
1. The person responsible for the products on a shelf will place a flag on the top of the shelf when the shelf needs to be replenished
2. The person in the warehouse will recognize this flag and will send some products to be displayed
3. The person in the warehouse will update the warehouse data system with this withdrawal
4. The data system will send an order to the supplier for more productsWhich step needs to be added to make this process a Kanban system?
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Question 24 sur 60
24. Question
Which is a purpose of the Eight Disciplines (8D) Problem Solving method?
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Question 25 sur 60
25. Question
The influence of alcohol and sleeping pills on a motorist driving a car is to be tested, specifically the braking distance. Which of the following can be assessed using the One- Factor-At-a-Time approach?
1. Normal braking distance when sober
2. Consequence of drinking a large volume of alcohol
3. Effect of several sleeping pills have on reaction time
4. Effect of both alcohol and sleeping pills combinedExact
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Question 26 sur 60
26. Question
Which of the three generic competitive strategies is evident in an organization that is performance driven, based on teamwork and welcomes change?
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Question 27 sur 60
27. Question
When comparing a short-term process capability index Cp to a long-term process performance index Ppk, what should the result be?
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Question 28 sur 60
28. Question
Assuming all data in the table below is accurate, a shift manager has been asked to calculate the Overall Equipment Effectiveness (OEE) during this shift.
The shift manager has submitted an OEE of 83.30%. Is this correct?
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Question 29 sur 60
29. Question
The manager of a coffee shop has created a list of customer requirements by listening to complaints, handing out surveys, holding focus groups and conducting
interviews. One common need was Good Customer Satisfaction. In order to understand what it is that fulfils this need, the coffee shop manager has created a Critical to Quality (CTQ) Tree:Is this an appropriate translation of the Voice of the Customer (VOC) into Critical to Quality (CTQ) metrics?
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Question 30 sur 60
30. Question
Which of the following describe elements of metrology?
1. Process of checking the accuracy of a measurement device
2. Adjusting as instrument to make sure it is within specification
3. Scientific study of the atmosphere and how it evolves through time
4. Ability to relate measurement to a reference standard in a way that is verifiableExact
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Question 31 sur 60
31. Question
A manufacturing company is replacing an existing horizontal saw with two new vertical cutting saws. These saws will guarantee accuracies to 0.0005”, making it easier to accurately cut large panels into smaller size pieces whilst taking up less floor space.
At the early stages of the DMAIC project, in every customer focus group, customer interview and customer survey, the Voice of the Customer (VOC) specified the need for ‘safety’.
The Process Failure Modes and Effects Analysis (FMEA) reviewed a number of potential safety issues and scored each of these with a relatively high Risk Priority Number (RPN).
The project leader has developed a Control plan to inspect and monitor process performance in detail, but this does not include any measures for safety.
Should this Control plan be implemented?
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Question 32 sur 60
32. Question
A bicycle manufacturer is planning to design and launch a new super lightweight range of road bicycles. It is understood that the market for this range of products has grown exponentially with the boom in triathlons. Race participation has shown an increase of more than 300% in the past three years.
At which stage in the product lifecycle should the manufacturer forecast profits from this new range to reach its peak?
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Question 33 sur 60
33. Question
Phillips & Company manufacture screwdrivers.
After thorough market research, they determine that customers would prefer rubber handles on their screwdrivers rather than plastic handles and would be prepared pay €1 more for such a feature.
To manufacture and ship the new handles there is an additional cost of €0.60 per unit. Is there any added value in changing the design to rubber handles?
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Question 34 sur 60
34. Question
The goal of an experiment is to find the best way to microwave a bag of popcorn. When a bag of popcorn is cooked in the microwave according to the instructions on the packet, most of the kernels pop, but some do not. The length of time the popcorn is in the microwave (between 3 and 5 minutes) and the power setting (between 5 and 10) seem to have an effect on the number of kernels popped. There are two brands of popcorn to choose from (A or B).
We know that popping corn for a long time on a high setting tends to scorch the kernels. Combined popping time (PT) and power settings (PS) are to be constrained (PT×PS < 40)
Which factor is NOT considered a factor of influence in this experiment?
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Question 35 sur 60
35. Question
A Kaizen Blitz is being carried out in a small retail outlet.
What is the first action that should be taken by the facilitator?
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Question 36 sur 60
36. Question
The changeover process of a press is shown below:
1. Run empty / stop production
2. Remove Mould ‘A’ from the press
3. Mould ‘A’ is cleaned and stored
4. Mould ‘B’ is picked up from storage
5. Adjusting Mould ‘B’ under the guidance of a mechanic specialist
6. Mould ‘B’ is installed in the press
7. Release production process by supervisor
8. Start productionWhat activities should be eliminated or made ‘external’ in order to reduce the changeover time?
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Question 37 sur 60
37. Question
Who introduced the concept of ‘Statistical Process Control’ (SPC)?
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Question 38 sur 60
38. Question
A 2-level Full Factorial design with 4 quantitative factors A, B, C and D is created. 4 centre points and no replicates are used. The results of the analysis are below.
Factorial Regression: Response versus A; B; C; D
Analysis of Variance
What can be concluded from the results table using a 5% significant level?
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Question 39 sur 60
39. Question
An anti-virus software company (AVS) released a software update to all its customers. The software update contained an unidentified coding error. This error
caused a healthy system file to be flagged as being malicious. Once the file was tagged as malicious, a built-in safety mechanism caused the system to reboot in an attempt to remove the malicious file. This caused the users to experience the ‘blue screen of death or an endless series of attempted reboots. Tens of thousands of users were impacted causing an estimated €50 million in lost productivity.
It is unknown why the coding error occurred, but possible fault paths need to be examined. The AVS quality assurance process missed the coding error before going into production.
There was no peer review of the software update completed before release. Both of these quality system failures require further examination. The following has been recorded in the table below:
Is this an appropriate application of the 5-Whys technique for this problem?
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Question 40 sur 60
40. Question
A team leader has been asked to do a Capability and Performance analysis on a process.
Although the data collected from each rational subgroup is normally distributed the data from the process as a whole is clearly not distributed normally.
Which of the following tools might be used in this analysis?
1. Capability analysis for each sub-group based on normal distribution assumption
2. Use a Box-Cox transformation and then analyse the process data with the standard tool
3. Identify the distribution and use a method that is based on the non-normal distribution
4. Perform a Z-transformation then analyse the process data with the standard toolExact
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Question 41 sur 60
41. Question
A courier company maintains statistics on all of its delivery routes. Past records show Route X takes between 10 and 15 minutes to deliver to, depending on variations in traffic. When checking the delivery records during the past week, the shift manager noticed that on Tuesday Route X took 34 minutes to complete delivery.
The shift manager has flagged this as a common cause variation and has proposed the use of bicycles, which can move more easily through traffic jams than the vehicles they currently use.
Is this a valid observation?
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Question 42 sur 60
42. Question
Which is the use of a skill matrix?
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Question 43 sur 60
43. Question
What statement describes a correlation analysis?
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Question 44 sur 60
44. Question
Which of the following questions should be asked on the completion of a process improvement project?
1. Should anything have been done differently?
2. What aspect of the project should be changed if doing it again?
3. What are the customer’s requirements and expectations?
4. What were the weakest and strongest points?Exact
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Question 45 sur 60
45. Question
Volume leveling has been applied to a manufacturing process. A single product is produced in three sequential steps:
Step 1: 20 minutes Step 2: 30 minutes Step 3: 50 minutes
These steps are operating independently of each other. The manufacturer of this product has promised to supply a customer with 100 units in three weeks or 95 production hours.
What is the largest number of units that can be produced in this time?
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Question 46 sur 60
46. Question
A manufacturing company is introducing a new training program at a cost of €42,000. The company’s existing training program cost €60,000 over the same period.
The new, more efficient and effective training program is expected to deliver increased productivity, improve customer satisfaction, employee safety and morale and reduce absenteeism.
Which of the following are soft benefits of the new training program?
1. Employees feeling safer
2. Cost savings of €18,000
3. Greater customer satisfaction
4. Higher employee moraleExact
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Question 47 sur 60
47. Question
Consider an investigation among 10 households on their spending behavior regarding food as a function of their income.
Regression Analysis: weekly food spending versus income
Analysis of Variance
Model Summary
Coefficients
Regression Equation
Weekly food spending = 1.2 + 0.0484 income
Which observation is appropriate for this data set?
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Question 48 sur 60
48. Question
A micro-brewery, working to the ‘Just In Time’ (JIT) principle, has received an order for 50 crates of beer. Each crate contains 24 x 30cl bottles (0.3 litres). With only one brewing kettle operational, the brewery can produce up to 100 litres of beer each day.
The manager of the brewery has promised to deliver the order in three days. Is this a realistic Lead-Time for this order?
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Question 49 sur 60
49. Question
Which activity will increase the ongoing overall costs of production?
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Question 50 sur 60
50. Question
A manufacturing plant has a number of inspections built into its production process. Many of these inspections are required for to comply with health and safety regulations, some are for control purposes and two are inspections that have been mandated by the customer.
Should any of these inspections be classed as the ‘Over-processing’ type of ‘Waste’ (Muda)?
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Question 51 sur 60
51. Question
A process owner wants to know if he can reduce the mean of the process by at least 20%, by using a different base material. In the old process the mean is 30 and the standard deviation is 5.
How large a sample must be taken from the new process to test whether there has been a difference with a confidence of 95% and a power of 90%?
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Question 52 sur 60
52. Question
Which characteristic of a company is MOST likely to influence the success of a Lean Six Sigma project?
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