[sixstringtheory]

Sounds good to me. Then I imagine the question is all about the kinds of changes that are being merged, which leads to: How many features can be produced per unit time? How many bugs are produced per feature that must be fixed therefore slowing the rate of feature production?

The questions of whether features are appreciated by users, or which bugs should be fixed or not, or if a product is feature complete or needs more, are questions of business, and not developer, productivity and efficiency.

And regarding documentation, I consider that an integral part of code/software that can be judged similarly w.r.t. quality and impact, having its own features and bugs.