Another angle. 'How long did a project this size take last time?'. As an aside, years ago I worked at a company that did thorough (and inaccurate) bottom-up s

Another angle. 'How long did a project this size take last time?'. As an aside, years ago I worked at a company that did thorough (and inaccurate) bottom-up schedules. I got dinged for not using quarter hour accuracy in the various task estimates.