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Amit Kumar Ojha

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Overview of Effective Survey Design

The survey is one of the most important data collection tools in the armament of a Six Sigma practitioner. There is no lack of research literature on the principles and designs of effective surveys. While the surveys conducted by academics and certain research institutes often reflect impeccable design, there are innumerable cases in which the…

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Use a Classification and Regression Tree (CART) for Quick Data Insights

In the Analyze phase of a DMAIC (Define, Measure, Analyze, Improve, Control) Six Sigma project, potential root causes of variations and defects are identified and validated. Various data analysis tools are used for exploratory and confirmatory studies. Descriptive and graphical techniques help with understanding the nature of data and visualizing potential relationships. Statistical analysis techniques,…