My current plan is extremely inconsistent with my actual data. For instance, the project started a year late and has already slipped by almost 15 months. Using my original plan, the actual defect data yields a defect tuning factor of 2000% when I run the Defect Tuning Calculator function.
Is the plan being factored into the defect tuning calculations? If so, can significant variation between the plan and the actuals result in an incorrect tuning factor?