Faisal Vohra

Thanks a lot Navin! Great info.

Hi Navin, Thanks for your reply. It was eagerly awaited. Just to reiterate, as stated in my question, the data type is contineous, and failed normality test. And thus, I was split between box cox & johnson transformation. As advised by you, you regard box cox as the stronger option. But I was told that Johnson was a much powerful transformation. I shall follow your instructions and go with box cox, but I would really appreciate more clarity between both, in order to make better inferences and decisions. Thanks!

So, as I see it, corporates are recognizing the edge that programs like Six Sigma & Lean provide their companies to stay ahead, stay competitive and stay profitable. Also, we keep hearing about banks and the private sector lapping up BBs and MBBs, and putting them up at key decision positions. BBs & MBBs bring with them crucial cross functional experience, and the skill to take profitable decisions based on solid research and data. Also, the fact that six sigma professionals are data driven, and have a sound analytical foundation makes they key resources with organizations. But here's another question: Does the actual six sigma DMAIC or DMADV program per se suffer a back seat when BBs & MBBs grow on to a more decision taking role than being more of a change agent with organizations?

Hi VK sir, While running process capability on a certain CTQ, with 50 readings, I am not certain whether to go by normal capability analysis and use Box Cox, or to go with non-normal and do a Johnson Transformation. The data is non normal, and continous. Both analysis give me different values (Box Cox: Overall Z Bench: 7.05, Johnson Transformation: Overall Z Bench: 7.12). I would like to know whether my approach is wrong and I should categorize data differently (normal/non-normal) or which test is more reliable. Thanks!

Hi Everyone, I would like your views on the relevance of Six Sigma in today's global context. Has Six Sigma finally come of age where it is viewed on a more corporate platform for business edge, competancy and excellence, or is it still largely seen as a program confined to quality departments of the manufacturing sector? Is it a program for Quality Engineers or has it moved on to also becoming an undeniable skill set for an MBA?