Absolute Estimation

An estimation approach where work items are sized in concrete units of time, such as hours or days, rather than relative units like story points. Absolute estimation asks 'exactly how long will this take?' rather than 'how does this compare to other work?' Research in cognitive psychology and software engineering consistently shows that absolute estimates are less accurate than relative ones — humans are poor at predicting duration but good at comparison. Absolute estimates also create false precision, encouraging stakeholders to hold teams accountable to specific time commitments despite inherent uncertainty. Most agile teams transition from absolute to relative estimation as they adopt story points and planning poker practices.