1. Apply the defect amplification model to the following example.

You are given the following development steps and associated error detection efficiency:

Preliminary design uncovers 70% of errors

Detail design uncovers 70% of errors

Code/unit test uncovers 60% of errors

And each of

Integration test, Validation test, System test uncovers 50% of errors

Tthe preliminary design phase generates 10 new errors and each of the detail design phase and the code/unit test generates 25 new errors.

The detail design phase passes 2 errors through unamplified whereas the rest are amplified at the ratio of 1:1.5. The detail design phase passes 5 errors through unamplified whereas the rest are amplified at the ratio of 1:3.