<span>Except in extreme cases, the evaluation of success or failure is subjective because time and cost to complete the project are estimates.
Things can go "wrong" or "right" in someones mind even if the overall project is going smoothly. Since project completion times are typically estimates, success is going to be subjective. In designing a new product, until that project launches and is deemed a success or failure, it's hard to classify it. </span>
