Lean Six Sigma Black Belt Sample Paper 2: Control This sample paper will check your knowledge on Control phase for LSS Black Belt Click on 'Next' to start 1. Control charts help us in all the following, EXCEPT:Understand and quantify process variationDetermine when to deem variation as random vs actionableIdentify cause of non-conformitiesMonitor a process in relatively real time2. A control plan should have __________________Action plan to out of control conditionsAppropriate sample sizes and frequency of all testingRisk mitigation plans to ensure X’s stay in controlAll the above3. A control chart that does not have any out-of-control condition is considered___________, and the process is operating in a state of __________.a. stable, statistical controlb. stable, no non-conformancec. capable, equilibriumd. capable, statistical control4. The project closure and benefit realization needs to be signed off by _______Project SponsorProcess OwnerFinancial AnalystAll the above5. With respect to control charts, which of the following is NOT correctly matched?Y-axis: Value of the characteristic under considerationCenterline: Represent process averageControl limits: Placed at Process average ± Standard deviationX-axis: Time order in which subgroup data was collected6. What is plotted in case of P-chart?Number of defectivesPercentage of defectivesProportion of defectivesProbability of defectives (P-value)7. Which of the following is NOT a question in the Control phase tollgate review?Has the Financial Benefit Summary been completed? Has the Resource Manager reviewed it?Has the necessary training for process owners/operators been performed?Have “lessons learned” been captured?Has the scope of the project been finalized?8. Control limits of which charts often appear ragged?np-chart, p-chart, c-chartc-chart, u-chartnp-chart, c-chartp-chart, u-chart9. In which of the following charts will the Lower Control Limit (LCL) not be artificially set to zero, if the calculation of LCL gives a negative value?R chartS chartX-bar chartnp chart10. Which of the following is a “living” document?Control planWork InstructionsProcess FMEAAll the above11. Which of the following is an example of Poka Yoke with high mistake proofing power?Shape of the SIM card ensuring the card fits only in one orientationCellphone alerting the user if battery goes below 20%Fire warning to evacuate the buildingNotification before sending the email asking “There is no title. Send anyway?”12. What is plotted in a U-chart?Defects per unit with respect to timeUnusual observations with respect to timeUniformity with respect to timeCount of Defects with respect to time13. Which of the following is true for variable data control charts?If the variation chart is out of control, then the control limits on the mean chart will be inaccurate and may falsely indicate an out-of-control conditionWhen the variation chart is in control, you can be sure that an out-of-control mean chart is due to changes in the process centerChart showing measure of dispersion should be reviewed firstAll the above14. Which of the following is true for Poka Yoke?Human errors are avoidedErrors occur, but do not result into a defectDefects occur, but do not move to the next stepAll the above15. Which of the following represents the correct sequence of activities in a reaction plan?Containment > Diagnosis > Verification > DispositionContainment > Verification > Diagnosis > DispositionContainment > Disposition > Diagnosis > VerificationContainment > Verification > Disposition > Diagnosis16. For a process in control, what is the theoretical probability that a single point on the X-bar chart will fall between the mean and plus one sigma?0.680.340.150.5017. Which of the following can be used as a Visual Control?Charts, graphsSigns, digital readoutsColors, shapes, arrowsAll the above18. Which of the following is NOT a test for special cause in a C chart?1 point more than 3 standard deviations from the center point9 points in a row on the same side of the center line14 points in a row, alternating up and down8 points in a row > 1 standard deviation from the center line19. Which of the following is true for a NP chart?The chart plots number of defectivesThe center line is the average number of defectsControl limits are raggedAll the above20. All the statements below are true about X-bar and S chart, EXCEPT ____In the X-bar chart, the center line is the mean of the subgroup meansIn the S chart, the center line is the standard deviation of the subgroup standard deviationsIn the S chart, the center line is the average of the subgroup standard deviationsThe X-bar chart can be out of control, even if the S-chart is in control21. Difference between p-chart and np-chart is _____________p-chart is for defectives data while np-chart is for defects datap-chart plots proportion of defects while np-chart plots counts of defectsp-chart is used for defectives data with fixed sample size, while np-chart is for variable sample sizeNone of the above22. Calls abandoned daily are monitored. Which of the following is an appropriate control chart to use?U chartI-MR chartNP chartP chart23. A _________is sometimes used in place of a control chart or until enough data are collected to construct a control chart.activity chartrun chartpre-control chartscatter plot24. Towards the final stages of the LSS project it is important to prepare the lessons learned document because ____________________The items captured here will help shape and refine how future projects are performedAnytime an action has an unexpected outcome, the event should be logged to make stakeholders aware for future issues of the same typeDocumenting helps in avoiding “recreating the wheel’ every timeAll the aboveTime is Up!
