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Mayank Gupta

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Everything posted by Mayank Gupta

  1. This question is amongst one of the many misunderstood concepts in Lean Six Sigma. The question particularly asked for tests to compare variances for more than 2 populations, however, there were many responses that described ANOVA and other similar methods. These methods are used to compare the central tendencies (mean or median) of the multiple populations. They do not compare the variances (spread of the data). From all the approved responses, the best response is from Afzal. Well done! P.S. - responses that detailed ANOVA and other methods have not been approved as they are incorrect responses.
  2. It was easy to identify the winner - Johanan Collins. Response from Manish Manjhi is a must read.
  3. This was a tough choice as there are answers which explain multi-voting well but without an example and vice versa. Considering that the question explicitly asked for an example, the winning answer has been selected from Chaitanya Shankar Nemani. Plus there is another common limitation in multi-voting - Bias. Voting can be influenced. Finally, while there is a school of thought that believes multi-voting and NGT are same (and some of your answers did reflect that), there is another that feels otherwise. While both the tools appear to be similar, they are different. I guess it is obvious as to which school I belong to P.S. The 2 different thought schools were not a part of decision criteria.
  4. Excellent explanation by Johanan and hence his answer is selected as the best answer.
  5. There are only guidelines and rule of thumbs regarding this. We consider XX% below to accommodate for process variations.
  6. Interesting answers to an enticing question. Both Deming and Crosby have laid out principles for an organization to optimize their processes. This question gives us an insight into the similarities and differences between the two. Best answer has been provided by Sandip Mittra. Well done!
  7. Hello John Few points to check 1. Have all process steps including material movement being covered in the chart? 2. Does this chart represent the actual mean time? (Any possibility of process changes where the mean time has increased and hence this chart is no longer valid)
  8. There are only 2 answers that have shown the differences between a regular control chart and CUSUM chart, making my job that much easier The best answer to the last question of 2021 has been provided by Gopal Menon. Read Johanan's answer to look at another example and Sandip's answer for a tabulated comparison.
  9. Platform economy is the new dimension that is driving the growth of organizations and countries. With this new dimension, there are new challenges for the organizations. This question sought a view of the participants as to how Lean Six Sigma can help these organizations along with the key drivers. There are two responses which stand out and hence have been selected as winning answers - Johanan and Gopal.
  10. This was a difficult one and I am pleasantly surprised to see some great answers from participants. There are two winners for this question - Sandeep and Shiva. Well done!
  11. Very interesting question and equally interesting answers The best answer has been provided by Johanan Collins.
  12. This was a tricky one to answer and I'm pleasantly surprised to see some great answers. There are two winners for this question - Plato Pathrose and Gopal Menon.
  13. Excellent attempt by all respondents at a slightly tricky question. Technical Debt though not very good for a software project, it is something that is inevitable. Every project will have some technical debt. However, lesser is always better as it means less refactoring and rework. Chaitanya has provided the best answer to the question.
  14. Interesting perspectives on the toughest component of a time series. In my view and with my experience, if I have to put the components in a decreasing order of toughness to handle, it would be cyclical > seasonal > trend. Best answer has been provided by Sandip Mittra.
  15. The winning answer was provided by Prashant Philip Vargis for providing the use cases for both Tableau and Power BI.
  16. Excellent answers from all participants. The best answer was provided by Roshini Vijayan for exploring the possibilities of multiple steps being integrated within the different phases of DMAIC.
  17. The best answer to this question has been provided by James Bob Lawless for highlighting the various methods by which refactoring can be avoided and Mohamed Asif for highlighting multiple guidelines for doing refactoring. And then, there are a couple of answers that are a must read - Chaitanya Shankar Nemani for giving the perspective of technical debt, Johanan Collins for highlighting a risk in refactoring.
  18. Great information on visual controls shared by all respondents. Pradeep Singh has provided the best answer to this question by highlighting the effectiveness of each of the methods in specific areas. Other answers worth reading are from Kiran Kumar and Mohamed Asif.
  19. Amazing answers from all, specially the examples that are quoted. While some of the examples are common and are quoted by many, there are a few unique ones - Satish, Prashant, Johanan, Prabhu, Kiran and Vijay. The winning answer is from Johanan for providing more details about HCD and for quoting substantially higher number of unique examples.
  20. There are some very good answers to this question and it was difficult to select the winner. There are 3 best answers to this question - Prabhu Gudelli, Johanan Collins and Kiran Kumar R. Well done all of you!
  21. All the published answers have highlighted the importance of Earned Value and its limitations. Answers from Prabhu, Johanan and C V Satish are a must read. The best answer has been provided by Prashant Philip Vargis.
  22. Prabhu G has provided the best answer to this question. The other answers are also very well written and hence I would recommend going through all of them.
  23. All published answers have quoted examples for how bodystorming can be used. Winning answer was provided by Johanan Collins (for its structure and clarity).
  24. While there are a couple of answers that theoretically explain the differences between card sorting and affinity diagrams, the question was about quoting an example as well. There is only one answer which has attempted that - hence Gopal Menon's answer has been selected as the winning answer.
  25. Varuna Kakathkar has provided examples from both manufacturing and service industries and hence it has been selected as the best answer. Johanan's answer is also a must read as he has highlighted a very pertinent disadvantages with respect to integrations.
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