Mayank Gupta
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Everything posted by Mayank Gupta
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Process Stability refers to the consistent output of a process. Stable process implies that the process is in control and giving a consistent output. If the process performance is not meeting the customer requirements, then we will have to improve the process. Improving the process becomes easier if it is in control.
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FMEA is a risk assessment and mitigation tool. Current RPN is the risk assessment component. New RPN (after the implementation of the recommended actions) is the risk mitigation component. Recommended actions primarily improve the Occurrence and Detection rankings. However, there is one scenario where the current RPN can change even without any recommended action - with passage of time, the Occurrence rank might change. The other rankings do not change in such a scenario.
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While all answers are very detailed and informative, there are two answers that clearly bring out the difference between RPA and IPA. These examples highlight how IPA is the next level of RPA and hence both of them have been selected as the best answers - Congratulations to Hirak Raval and Ashish Kumar Sharma.
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This was a tough one to answer. Rahul Arora has given the best answer to this question. Read through the other answers to get some more examples that highlight the differences between Bayesian and Frequentist approach.
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This was a slightly tricky question as it is well known that AHP edges over Pugh Matrix. There are a few answers worth reading - Piyush Jain, Rahul Arora, Ashish Kumar Sharma and Rakesh Chandra. Winner for this question is Ashish Kumar Sharma for accurately summarizing the differences between the two tools and providing an example where Pugh Matrix can be used over AHP.
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It is heartening to see so many published answers all with the same central thought process that PMBOK artifacts are relevant across various DMAIC phases. We have joint winners for this question - Shraddha Sequeira and Soji Sam. Excellent answers from both of them, specially highlighting the fact that the PMBOK phase wise deliverables might not be match as is with the five phases of DMAIC. Answer from Ashish Kumar Sharma is also a must read as well for the table that has been put together for Prepared, Maintained and Referred (one might have a difference in opinion about the positioning of P, M and R. However, it is a great way to visualize the relevance of artifacts with DMAIC lifecycle).
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All the published answers are brilliant. While Kiran's answer is short and to the point and clearly tells us where to use which test, Soji's answer highlights a weakness in the most popular Normality Test. Both answers have been selected as the winners. Congratulations to both!
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Ambikesh Tiwari has given the correct answer to this tricky question. Well done!
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While all answers are correct, the best answer has been provided by Piyush Jain for the detailed explanation on ANOVA and an example that runs through all the ANOVA variants!
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- anova variants
- anova
- ancova
- manova
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Autocorrelation violates the assumption of independence of residuals in regression and it adversely affects the regression analysis. It can be checked graphically by looking at the 'Residuals vs Data Order' graph or by using the Durbin-Watson statistic. From all the published answers, there are 2 that stand out - Rahul Arora and Soji Sam. Rahul's answer has been selected as the best answer because he addressed how Autocorrelation affects Regression. Soji's answer just misses out as it does not answer how autocorrelation affects regression. Otherwise, it is a must read answer.
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Among all the published answers, the best answer has been provided by Kaviraj. Well done! P.S. There were some brilliant answers but they failed the plagiarism test. Requesting all respondents to be a little careful regarding plagiarism.
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While all published answers are correct, the winning answer has been provided by Chandra Shekhar Chauhan for demonstrating how Cpm can be calculated.
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Mohamed Asif has provided the best answer to this question. Well done!
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There are two answers that have been selected as winners - Mohamed Asif and Chandra Shekhar Chauhan. Both the answers clearly highlight the difference between the two approaches using an example and have also mentioned valid reasons for selection of one over the other.
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Winning answer to this question has been written by Mohamed Asif. His answer highlights the techniques to correctly classify the data and then decide whether it is required to be stored or not.
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Interesting examples quoted by all respondents. Rohit's answer has been selected as the winner. Congratulations!
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This was a slightly difficult question to answer and it is heartening to see correct answers. The best answer (for the content and the way it is structured) is from Rahul Arora. Answer from Mohamed Asif is also a must read!
