Fair but this is the thing we all do wrong with estimates. I've come to the following system that I think works well and captures the uncertainty. Estimates ar

Fair but this is the thing we all do wrong with estimates. I've come to the following system that I think works well and captures the uncertainty. Estimates are given as the following choices: hours, days, weeks, months, quarters. You never give a number tp the units. These all mean some "small number of X" where X is the list above. Then if Product has a question like, "Why would Z take weeks?" then you can have a discussion about the complexities and the task can be further refined and/or split into multiple things and those can be estimated as above, rinse and repeat.