Lean Six Sigma Black Belt Sample Paper 2: Improve This sample paper will check your knowledge on Improve phase for LSS Black Belt Click on 'Next' to start 1. The operators of a manufacturing cell work out a more orderly arrangement for tool storage and establish a schedule to maintain cleanliness daily. These improvements are best described by which approach to problem solving?5SVisual aidsPoka yokeSMED2. Power of the design can be increased by ________________Replicating the center pointsReplicating the corner pointsBoth of the aboveNone of the above3. Which of the following represents the correct sequence in a DoE study?Design selection > Brainstorm factors > Decide response(s) > Determine optimal settings of factors for desired response > Conduct experimentsDesign selection > Decide response(s) > Brainstorm factors > Conduct experiments > Determine optimal settings of factors for desired responseDecide response(s) > Brainstorm factors > Conduct experiments > Fit data into design > Determine optimal settings of factors for desired responseDecide response(s) > Finalize factors & their levels > Design selection > Conduct experiments > Determine optimal settings of factors for desired response4. In a fractional factorial design, the 2 factor interactions (2FI) are confounded with other 2FI’s. What is the resolution of this design?Resolution IIIResolution IVResolution VResolution VI5. Two drugs A & B were evaluated for their effectiveness. However, drug A was tested only in individuals with <30 years age while drug B was tested only in individuals with >30 years age. In such a case the effect of the drugs and age of the individuals is said to be _______________BlockedConfoundedFoldedReplicated6. Calculate the effect of factor “B” for the below.65-655-57. Which one of the following is NOT correctly matched to its purpose?Replication: Understand sources of variability that are not seen in repeat measurementsCenter point: Understand the effect of hard-to-change factorsBlocking: Technique to include other factors in our experiment which might contribute to undesirable variation.Randomization: Eliminate effects of unknown or uncontrolled variables8. If the effect of factor A is 10, it means ___________When A changes from high to low, the response on an average increases by 10When A changes from low to high, the response on an average decreases by 10Both of the aboveNone of the above9. With respect to DoE, “Block” for_________ factors and “Randomize” for__________factorsknown nuisance, unknown noiseunknown noise, known nuisanceknown nuisance, known noiseunknown nuisance, unknown noise10. The disadvantage of using Pugh Matrix is ___________A datum is required to create the matrixEach alternative is compared to the datum but not to other alternativesThe extent of bettering or worsening is not factored in the calculationsAll the above11. Hindering CTQ’s from HoQ can be optimized to achieve the “Sweet spot” using _________(Sweet Spot: Targets for multiple CTQ’s are achieved)Design of ExperimentsDe Bono six thinking hatsQFDPugh Matrix12. Which of the following is introduced in a design to check if the relationship between X & Y exhibits curvature (non-linearity)?Center point(s)Block(s)RandomizationFolding13. What is the number of runs that would be required if we had 3 factors, 2 levels, 2 replicates of the corner points, 3 Center points and 1 block?3319272214. All the pairs below are incorrectly matched, EXCEPTFull factorial design: Changing one variable at a time (keeping others constant) to understand the impact on the outputTrial and Error: Randomly changing multiple inputs to observe changes to outputFractional factorial design: Running all factors at all levels and developing a modelOne-factor at a time: Running a subset of the full factorial design15. Which of the following DoE can also be used as a screening design?Completely randomized full factorial design with center pointsReplicated factorialMultilevel factorialFractional factorial16. Which of the following is an example of a pilot?Prototypes developed for early evaluation by end usersImplementation at one work area/regionTest marketingAll the above17. With respect to an interaction existing between two factors, which of the following is true about the interaction plot?The plot will show two overlapping lines representing the low and high levels of one of the factorsThe plot will show two parallel line representing the low and high levels of one of the factorsThe plot will show two non-parallel lines representing the low and high levels of one of the factors, which may or may not be intersectingAll the above scenarios are possible18. In Minitab, which of the following can a black belt use to assess the significance of factors in either a fractional or a full-factorial design?Half-normal plot of effectsANOVA tablePareto plot of effectsAll the above19. One factor at a time studies would not be able to identify interactions between the factors as compared to full factorial designs. The statement is ________FalseTrueTrue, only if center points are included in the designCannot comment until resolution is known20. Statements given below are true, EXCEPT:In Resolution III designs, the main effects are confounded with 2 FI’sIn Resolution IV designs, the main effects are confounded with 3 FI’sThe maximum resolution in fractional factorial designs is Resolution VLow resolution designs can serve the purpose of screening rather than optimization if we have many factors21. Calculate the interaction effect (AB) for the following data and match with the appropriate statement0; There is a strong interaction between A & B0; There is no interaction between A & B20; There is an interaction between A & B80; There is an interaction between A & B22. What resolution will you choose to perform a two-level fractional factorial design; 6 factors, 2 replicates necessary; if the budget doesn’t allow more than 20 experiments?IVVIIIIII23. All the following statements regarding reduction of a model for 3 factors (A,B & C) are true, EXCEPT:Insignificant C can be dropped even if BC is significantInsignificant AB can be dropped even if A and B are significantAC can be significant even if A and B are insignificantIf ABC is significant, then no model reduction can be done24. Which of the following statements is incorrect?a. DoE is done preferably using historical datab. Multiple Regression can be run on available historical datac. Interactions can be better identified from data generated through designed experimentsd. DoE is a better approach than One-factor at a time (OFAT)25. Residual is an estimate of experimental error obtained by subtracting the ________ from the_________.Common cause, Special causeSigma level (Long term), Sigma level (Short term)Observed value, Predicted valueMean, USL26. An experimental run is conducted several times for the same treatment combination to neutralize the effect of any uncontrollable, unknown factor. This is called___________. However, conducting repeated runs at the same experimental conditions (with a time gap in most cases) is called__________.Replication, RepetitionRepetition, ReplicationReproducibility, RepeatabilityRandomization, BlockingTime is Up!
