A fixed period of time allocated for a specific activity, after which the activity must end regardless of completion status. It creates urgency and forces prioritization of the most important work within the constraint.
Compound of 'time' from Old English 'tima' and 'box' from Greek 'pyxis' (container). The concept emerged in Rapid Application Development in the 1980s and was adopted by Agile methodologies to enforce discipline and prevent perfectionism.
Timeboxing exploits Parkinson's Law—'work expands to fill the time available'—by artificially constraining time to force efficiency! Many teams discover they can accomplish 80% of the value in 20% of the time when they're forced to focus on essentials.
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