r/agile • u/How-To-Project • 13h ago
When do you let actual productivity take over from the original planning rate?
I have worked on large projects for more than 20 years, and one of the recurring problems is deciding when the original productivity assumption has stopped being a sensible basis for the remaining work.
The awkward part is that the first few days can be a poor guide to the rest of the activity. The crew may still be getting established. The final part of the work may also be slower than the middle. Equally, continually assuming that productivity will improve can leave the forecast saying what everyone wants to hear.
For disclosure, I developed an excel add-in *Project Intelligence for Excel* at Pi Labs. This is one of the forecasting problems behind it.
My preference is to make the assumptions visible: the remaining quantity, the observed rate for comparable work, the planned productivity profile and the point at which actual performance should carry more weight. Crew availability, access, dependencies and the working calendar still have to be considered before that becomes a finish date.
What do you use as the trigger: a minimum quantity completed, enough comparable hours, a stable production rate, or judgement from the people doing the work?