Estimating is often helpful
Estimating helps when the process of estimating builds shared understanding among the people who want the work done and the people doing the work.
Collaborative estimating gives the best results. Diverse experience yields a broader range of perspectives and questions. […]
Group estimating reveals differences in knowledge and understanding. Finding those gaps early is helpful. […]
Sometimes estimating reveals you only know enough to reason by analogy. The best you can do is posit that the desired functionality is about the same size as X. […]
[…] resist guessing and speculation. Estimates born of ungrounded guesses are worse than useless. Rather than guess, experiment, interview, model, sketch designs or do some activity to gain more clarity about needs and context. Then try estimating again.
Estimates are often NOT helpful
People turn estimates into targets. […]
People construe estimates as promises. No one can predict the future, but many people treat estimates as guarantees. […]
People construe estimates as bids. […]
Inappropriate precision in estimates implies that people know more than they do. […]
People game estimates. […]