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Rupinder N

Excellence Ambassador
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Rupinder N last won the day on September 10

Rupinder N had the most liked content!

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14 Good


About Rupinder N

  • Rank
    Advanced Member

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  • Name
    Rupinder Narang
  • Company
  • Designation
    Principal Consultant

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  1. Rupinder N


    The best answer for this question is provided by Bheemannadora Sappa. The answer is the chosen best answer due to its sharpness, brevity and writing acuity. The details provided in Vastupal's answers are good to read, too.
  2. Rupinder N

    Pre-Control Charts

    We have limited responses today but I want to applaud both the Ambassadors for attempting this question which is based on a topic not known to all. This is what underlines the intent of this forum - we get to learn what we do not already know. The chosen best answer today is that of Bheemannadora Sappa for covering all aspects, for the structure and lucidity of the answer. A call out to Arvind for attempting in the extended time!
  3. Rupinder N

    Nominal Group Technique (NGT)

    This was an easy question and we received many answers. But it is important to phrase the answer in your own words for it to be accepted and approved on the Forum. The best answer today is that of Vastupal for completeness and the level of detail. Congratulations!
  4. Rupinder N

    Rolled Throughput Yield Part 2

    Great attempt by everyone and very neatly explained that the customer will not be willing to pay the cost due to the "hidden factories". The chosen best answer is that of Vastupal for providing the explanation in great detail. Must read Venugopal's answer to understand with the help of a clearly outlined example, complete with calculations. Keep it up!
  5. Rupinder N

    Power of Hypothesis Test

    Great job, Vastupal and Venugopal for providing a detailed and well explained answer. The chosen best answer is that of Venugopal as the table makes the description easy to read and understand.
  6. Rupinder N

    Measure of Dispersion

    It is good to see some of the Excellence Ambassadors attempting all questions, and also great to see some new names on every question. The question asked for explanation on when is Standard Deviation Superior than Range and IQR and conversely, when is Range a better measure than Standard Deviation. The chosen best answer for this question is that of Mohan PB, because of completeness and brief explanation, too. Congratulations!
  7. Rupinder N

    Skewness and Kurtosis

    The chosen best answer is that of Vishwadeepak Choudhary. The answer mentions correct definitions (please note that experts discarded the Kurtosis definition which mentions "peakedness" of data and only define it as the combined weight of the tails with respect to the rest of the distribution" ; the images in the answer make it easy to understand the definitions. The answer also mentions correctly that the measures are sensitive to sample size and do not provide any additional information than we would get from other tools and measures such as boxplot, center, dispersion etc. Kudos to all three participants, this was a tricky question to attempt!
  8. Rupinder N

    Risk Priority Number (RPN)

    It is great to see detailed answers for a question on a tool deemed as complex by many Six Sigma experts. The question sought answers to what apart from subjectivity in the rating scale is the limitation with using RPN. Most answers bring out one key point that RPN does not draw your attention towards the severity number. This is explained very well in several answers - hence making it complex to choose the best answer. Breaking the tie is the "suggested treatment" to this limitation which is provided by Vishwadeepak Choudhary, hence chosen as the best answer. I do recommend everyone reading all the answers to get a well rounded understanding.
  9. Rupinder N

    Force-Field Analysis

    It is great to see that all responses provided relevant examples. The best answer is that of Vastupal Vashisth as he has included additional explanation and goes beyond just mentioning the driving and restraining forces.
  10. Rupinder N


    The best answer is that of M Kumari Lalita. She has chosen a very simple example and stuck to true meaning of the acronym SCAMPER. The answer includes very simple examples that are interesting and everyone can relate to.
  11. Rupinder N

    Hiring a Lean Six Sigma Black Belt Professional

    It is interesting to see that the Excellence Ambassadors have quickly delved into the crux of this question – what are the competencies that we need this person to excel at in order to be successful in this role, if not just a certificate. It is interesting to see how all participants – for and against – cited these competencies in their own way. Some points brought out, in addition, are – does one need to do DMAIC/DMADV projects to become good at these competencies, how is practical knowledge different than theoretical (what competencies do you get to hone). I would add that the success or the lack of it will also depend upon how resourceful this person is, are they willing to learn as they go along, are they someone who builds on and learns from every project, do they read and research extensively or not. FOR – Krishnamurthy Rao mentions some of the competencies that become more developed if one has completed DMAIC and DMADV projects. This includes not only successful projects, but also learning from the projects that were not successful, which is a great point to make. AGAINST – Togy brings out some interesting points about what is really needed in a BB role rather than just focusing on project completion.
  12. Rupinder N

    Zero Defect - Debate

    FOR – A lot of answers indicate that we need to know “what is the definition of defect”, which is a key to this question’s answer. There are some answers which also quote some example e.g. Karthik Mudliar has mentioned an example of a USB slot, Vastupal mentioned that an ATM machine will not accept a card inserted the wrong way, likewise a sim can be inserted only in a certain way etc. Some other examples could be data services automatically being severed after reaching a certain limit (if the customer does not want to be charged for exceeding the limit), a work flow not allowing a request to be sent for further approvals without department head approvals, and many more. The best response in the “FOR” category is that of Vastupal, as he has brought out the definition aspect and also shared a few examples (though in two different responses), which only makes his passion for his point stand out. AGAINST - Some of the answers also provide examples how companies or processes supposed to operate at high level of performance also have failures. Reminder – the question did not ask if it is possible for every process to be zero defect. The best response in the “AGAINST” category is that of Venugopal. He has asked some very pertinent questions. The debate has also brought out some finer nuances such as the cost for going after zero defect could be high, but can that possibly be offset by the reduced rework and COPQ. Well done, Excellence Ambassadors!
  13. Rupinder N

    CV, Coefficient of variation

    Coefficient of variance can be used to compare the spread of two different populations, with values varying over different ranges. Being a unitless value it finds application in several areas as highlighted in several answers. The biggest drawback is that it cannot be used when the mean of a sample is zero. The three best answers are for Kavitha, Rajesh and Mohan. The chosen best answer is Kavitha's which outlines several examples in addition to the pros and cons.
  14. Rupinder N

    Specification Limits

    The twist to this question definitely made it very interesting. It was great going through all the responses and a lot of creativity shows through in the answers. The best answers are those of Anirudh Kund, Rajesh Chakrabarty, Venugopal R and Mohan PB. It was rather tough to choose the best answer to this question as everyone has brought out one or the other unique way to act in this situation. The best answer amongst these 4 is that of Anirudh as it mentions many of the pertinent questions that can be asked in such a situation. The rest of the answers are worth giving a thorough read, too.
  15. Rupinder N


    ARMI provides information on the roles of the key stakeholders and how they may evolve during the course of a project. Whereas, RACI provides role assignment at the level of each task, hence, providing more information and clarity to execute a job well. The three best answers are that of Sumanta Das, Sandhya Kamath and R Rajesh. Sumanta's answer is the chosen best answer because of the sheer detail and how it has been broken out into palatable pieces.