Many fields seem to ramp to a peak level over a period of a few months to a few years, then maintain a plateau. Its possible to make guesstimates (they are inherent in most predictions, as you know) but having a considered view of that shape is extremely useful. Best would be a year by year production shape.

If I ever have a spare moment, I'll see what I can do. I've got half of it.

In terms of analysis - yes, we need to explore the various estimation methodologies one might use. In terms of the Wiki page, the content needs to be verifiable - so there must be some attribution to some source (generally ultimately the operator of the field) that stated the peak date.