Project management is about continually reviewing the plan! If you think the schedule is slipping, you notify all those involved and make a new plan of what to do.
Schedules are fluid, especially when you are researching or developing anything. This is understood in engineering circles and there is no blame culture at all. There is a standard process we follow in project management and work package management. Our duty is to show integrity. We constantly monitor our work to make sure we are aware of issues.
We:
1. Figure out how far behind we are
2. Report falling behind
3. Identify the cause
4. Learn from it and GUESS how much more work there is to do
5. Adjust the projection of the completion date
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The important word is “Guess”. Schedules are estimates and no one is surprised when they are wrong.
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