Using estimates has not and never will be a useful idea. You are in one of two worlds, either your work is predictable and easy to estimate, in which case you c

Using estimates has not and never will be a useful idea. You are in one of two worlds, either your work is predictable and easy to estimate, in which case you could just count the number of tasks/stories and get a sufficient estimate anyway, or your work is very unpredictable in which case your estimates are a lie.