As many have mentioned, a missed milestone is a failure. It is important to figure out how the milestone was missed what could could have been done to avoid it. Once a plan is put in place for the next time things may go wrong, the milestone may be achieved without losing any time. After careful analysis, it is equally important to understand that a missed milestone is not the end of the project. We should anticipate that something will go wrong and when it does we should not beat ourselves up about it. Rather, we should regroup and alter the plan to account for the missed milestone and understand that ultimately it is a team failure, not any one individual’s.