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Calculate Project Sigma - An Objective Method For Navigating Your Project Successfully
October 26, 2008 | Author: PM Hut | Filed under: Project Management Best Practices, Quality Management, Techniques
Calculate Project Sigma - An Objective Method For Navigating Your Project Successfully (#2 in the series An Objective Method For Navigating Your Project Successfully)
By Bill Miller
When the fix rate is tracking ahead of schedule, the actual defects left-to-fix line plots below the expected defects left-to-fix line, and when the fix rate is tracking behind schedule the actual defects left-to-fix line plots above the expected defects left-to-fix line. Similarly, when the find rate is tracking ahead of schedule, the actual defects found line plots above the expected defects to find line, and when the find rate is tracking behind schedule, the actual defects found line plots below the expected defects to find line.
To get a measure of the degree the lines are behind or ahead of schedule, move the end date of the expected lines forward or backward until the actual line plots with the trend nearly identical to the expected line. Subtract the calculated end date from the original end date. This value is what I term Project Sigma. It is negative when the project is tracking behind schedule, and it is positive when the project is tracking ahead of schedule. The larger the absolute value of Project Sigma, the greater your project is ahead or behind schedule.
Bill Miller has 23 years experience developing and managing software projects, most of which are in financial information and network management domains. He has managed teams as large as 60 professionals, and he’s been responsible for developing and rolling out software process in multiple organizations that have been rated at CMMI Level 3. He is the author of the popular blog yuwantitwhen.com, dedicated to promoting practical methods for successful software project management. He may be reached at bill(at)yuwantitwhen(doc)com, or please visit his site at http://yuwantitwhen.com.
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