The Due Date doesn't mean the Do Date
If you have a Due date, you need the plan to show up on that date, with what is Due for the cost of that Due Item and have that Due Item be compliant with the attributes (effectiveness and performance) needed by those paying you.
I was asked to look at a corrective action plan this year, that had a list of deliverables that were supposed correct the root causes of the problems identified as the reason the project was not performing as planned. The right two columns were the person performing the work and the DONE date.
A big smile came to my face. I see the real root cause of your troubles here. You don't know what Done looks like. That's the first immutable principle of project success.
Without knowing what Done looks like in units of measure meaningful to the decision makers, the project has little hope of success.
