The question is: How many test cases should you have? The hindsight answer always seems like, "One more.•bCrLf People say learn by burn is the most effective approach. This learning curve can be a fast but very expensive way to learn, not only for your company but maybe for your career. Everyone has been part of a technology or process change that was not tested fully. This may have led to downtime, loss of productivity and frustration. I have seen a few people be let go because of the lack of testing before implementing a change. I want to give you the tools to help you succeed.