Hockey Sticks and User Assistance: Writing in Times of Resource Constraints
http://www.uxmatters.com/MT/archives/000263.php

Hughes, Michael A.
UXmatters
2008

Abstract:

If you have all the resources you need, do the very best job you can in all respects. But if your resources are tight, ask yourself whether you are writing the essential stuff at a level of quality users will notice. Also, ask whether the value of the documentation you are producing aligns with the economic pressures on your company.