Production dice create uncertainty in the simulation. Your resource decision determines who gets an opportunity to produce; the dice determine the actual quantity generated by those resources.

Normal production
Each working resource rolls the standard production dice shown on the resource card. The resource total contributes to the week's gross production.
Overtime production
From Week 2, a resource with overtime authorised receives one additional production roll. That roll is added to the resource's normal production result.
Then the PM quality adjustment is applied
The total shown by the resource dice is not necessarily the final accepted project progress. The Project Manager quality adjustment can remove defective objects or add accepted PM contribution.
Capacity creates opportunity, not certainty. You may spend more on optional resources or overtime and still receive a modest production roll. That uncertainty is part of the project-management challenge.
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