I'm doing something similar I guess. It's more of a two-point plus uncertainty/confidence estimation. I'll give a range (2-3 days say) and I'll estimate how unc

I'm doing something similar I guess. It's more of a two-point plus uncertainty/confidence estimation. I'll give a range (2-3 days say) and I'll estimate how uncertain (or how confident) I am in that range. For larger tasks I'll break it down into smaller subtasks and estimate individually. For example if I need to use some new library that I've never used before, my estimate for that will be quite uncertain. Perhaps the library has some weird quirks it takes time to figure out. If I have to do something I've done often, I'm quite confident in my estimate. Effectively similar, except I don't like to estimate unknowns so I don't give an explicit worst-case time.