Naresh Joshi

Thanks sagar. I got it tried and got the answer. how abt % defects before and after?

Sagar I missed attachments. here they are Case Study Data Before Improvement.xls Case Study Data Post Improvement.xls

Thnks for your inputs. You will find all data in decimal form. I can just guess it appears as if it is cost and hence continuous. It would be great if you could give your inputs on one more thing. Project leader wants to compare mean connection time "Before" and "after". And defects % "before" and "after" using hypothesis test. Sheets for before and after is as attached. How to test?

1. For analyse phase - Are all the data for tests continuous? and so 2 sample t test and Anova test to be used? 2. For defects (in CAF) critical X can be worked out from pareto analysis of total cost of occurence (frquency x cost of occurence) against defects? How can it be done on Minitab? I am finding it difficult to work it out in minitab. Case Study Data Before Improvement.xls