Vishwadeep Khatri

Q. 208. Please refer to https://www.benchmarksixsigma.com/forum/make-this-lean/ Once you have seen the eight checks in the post, visualize how and whether some of these checks can be reduced at the Airport? Without compromising on Safety and Accuracy, how can you make this process as Lean as it can be? Note for website visitors - Two questions are asked every week on this platform. One on Tuesday and the other on Friday. All questions so far can be seen here - https://www.benchmarksixsigma.com/forum/lean-six-sigma-business-excellence-questions/ Please visit the forum home page at https://www.benchmarksixsigma.com/forum/ to respond to the latest question open till the next Tuesday/ Friday evening 5 PM as per Indian Standard Time. The best answer is always shown at the top among responses and the author finds honorable mention in our Business Excellence dictionary at https://www.benchmarksixsigma.com/forum/business-excellence-dictionary-glossary/ along with the related term.

Natwar Lal has provided four different service sector scenarios of Genchi Gembutsu and he is the deserving winner for this question. Do have a look at the response by Benchmark Expert - Venugopal.

Q. 208 While Genchi Gembutsu seems to make perfect sense in manufacturing, how do you infer its relevance in highly intangible services like trouble shooting in Software Development or issues found in e-commerce platforms? You may like to provide more examples of relevance from other service sector. The question will remain open for responses till 8th November, Friday, 5:00 PM IST/ 11:30 AM GMT/ 4:30 AM PST. You may use any sources to frame your answer, however, the answer must be written in your own language. Mention your information and image source, where applicable. Plagiarized responses will not be approved. Answers submitted as images will not be approved either.The approved responses will be visible after the question is locked on 8th November 2019, Friday, 5:00 PM IST/ 11:30 AM GMT/ 4:30 AM PST. The best answer will be selected and points will be added to the Excellence Scoreboard - https://www.benchmarksixsigma.com/forum/excellence-scoreboard/ All questions so far can be seen here - https://www.benchmarksixsigma.com/forum/lean-six-sigma-business-excellence-questions/

Hi Rahul, let us assume this to be population data. As number of men and women taking part in a contest are not same, imagine that the judges took a decision that winning gender will be one that has bigger percentage success rate.

I do see some companies asking for domain specific knowledge. Our experience has been largely different. Majority of the global leaders that we have worked with were our first client in that sector. This has happened in several domains - here are a few - FMCG, Shoes, Aircraft, Starch, Soft Drinks, Liquor, Web Search, e-commerce, Fintech, Navigation, and Real Estate Management Services. I have seen hundreds of professionals shifting to highly unrelated sectors, for example, Telecom to Hospitality, Manufacturing to IT, Banking to IT, ITES to Banking and so on.

Bench's company has been working hard and making small cost reductions year on year while Mark's company created a new offering that brought down the cost drastically. Mark's team used the power of DFSS. DFSS (Design for Six Sigma) is a methodology that is used for designing new products and services. This methodology is not very popular as only companies with long term thinking can make good use of it. A small number of our clients ask for DFSS and then make sure they design robust products and services to take a lead in the market place.

Both Natwar Lal and T Jayaram are winners for responses to this question. Natwar Lal has done a good comparison and has provided examples where equivalence testing is preferred. Jayarm has highlighted Two One Sided T tests (TOST) as another term used for equivalence testing. Do read the response from Benchmark Expert Venugopal for additional learning.

Q. 207 As AI gets more powerful in coming years, what will happen to the fast growing RPA? Will RPA be aided by better AI and grow faster? Or will RPA's growth rate slow down? Give reasons to explain your answer. Note for website visitors - Two questions are asked every week on this platform. One on Tuesday and the other on Friday. All questions so far can be seen here - https://www.benchmarksixsigma.com/forum/lean-six-sigma-business-excellence-questions/ Please visit the forum home page at https://www.benchmarksixsigma.com/forum/ to respond to the latest question open till the next Tuesday/ Friday evening 5 PM as per Indian Standard Time. The best answer is always shown at the top among responses and the author finds honorable mention in our Business Excellence dictionary at https://www.benchmarksixsigma.com/forum/business-excellence-dictionary-glossary/ along with the related term.

Hi Sashank, Subgrouping is usually not done with discrete data unless there is a sound objective behind it. If overall scores was the winning criteria, looking at groups must have been avoided. You have mentioned correctly that the intent of sub-grouping is unclear.

Absolutely Natwar, Simpson's Paradox it is.

Hi Rakesh, you are right in saying that actual scores should have been used. As this analysis is utilizing a pass-fail data, the option was to look at pass percentage. If actual scores were available, it would have been possible to consider median.

Check this debate between Bench and Mark on announcing winners for a contest. Is Bench incorrect here? Description - There is an announcement that the results for Men vs Women contests are about to be announced by Bench an Mark. The reward is to be given to better performing gender. To add spice to the contest, men and women had been divided into younger and older folks. Bench comes on stage and says that he will announce the result with some analysis. He explains that younger men have done better than younger women. He then goes on to show that older men have also done better than their older counterparts. With this analysis, he concludes that men have won the contest. Dramatically, Mark comes in and announces that the final winners are women. Bench argues with Mark saying that men were better in both the categories. Mark says that overall percentage pass rate of women is better than that of men and shows the aggregate scores. Mark highlights that the award was meant for better overall performance. Bench cannot figure out how this makes any sense. Bench continues to think that if there are only two categories possible and men did better in both, men should be considered winners. The cartoon highlights a possibility of misrepresentation that exists in many analyses, especially where sub-grouping is done and subgroups are analysed. Feel free to discuss this below.

Winner for this question is Natwar Lal. Please go through expert view by Venugopal as well.

Q. 206 Why is a test of equivalence (also called noninferiority testing) considered the opposite of Hypothesis testing? Give examples where noninferiority testing is a better approach as compared to usual hypothesis testing. Note for website visitors - Two questions are asked every week on this platform. One on Tuesday and the other on Friday. All questions so far can be seen here - https://www.benchmarksixsigma.com/forum/lean-six-sigma-business-excellence-questions/ Please visit the forum home page at https://www.benchmarksixsigma.com/forum/ to respond to the latest question open till the next Tuesday/ Friday evening 5 PM as per Indian Standard Time. The best answer is always shown at the top among responses and the author finds honorable mention in our Business Excellence dictionary at https://www.benchmarksixsigma.com/forum/business-excellence-dictionary-glossary/ along with the related term.