These kinds of projects severely impact the provider as well. The provider’s number one priority is to deliver on the scope of the project to the customer. That has to be the most important principle for a provider, held above all else, because a project that ends with an unsatisfied customer is a complete waste of everyone’s time.
However, a very close second priority is delivering a project quickly and efficiently, even when there is no time pressure from the customer. Long-running projects incur overhead in several forms. As projects run late, the provider may now have more concurrent active projects.