Ever wondered, how do you measure testing productivity or testing effectiveness? When to say testing is complete? In all such questions, QA metrics come to the rescue. QA metrics allow test leads or managers to take decisions on various situations encountered in the project life cycle. Tricky part is that QA metrics make sense only in the given context. For example, for one project 95% pass percentage is good to go live but for a safety-critical application anything less than 100% is life-threatening.