Right now, we have 4 estimation tags on SESE: estimation and its unmerged synonym time-estimation (239 questions), cost-estimation (29 questions), and workload-estimation (11 questions).
I present two questions to the community:
Should the cost-estimation and workload-estimation tags have a target synonym of estimation? Should these tags be merged?
I believe the answer to both is yes - the process of all different kinds of estimation is close enough that someone skilled in one can most likely help with the others, and it doesn't make sense to split questions about estimation across many tags. But before I go do this, I want to hear from the community.