Parkinson’s law
Parkinson’s law is the adage that "work expands so as to fill the time available for its completion." It was coined by the British naval historian C. Northcote Parkinson in a satirical essay published in The Economist in 1955 and later expanded into his 1958 book Parkinson’s Law: Or the Pursuit of Progress.
The law is a wry observation about effort and deadlines. Give a task a wide window and it will consume the whole of it; compress the window and the same task will often be finished in far less time. The pressure of a deadline, not the inherent size of the work, sets the pace. Parkinson framed the claim as satire, but it has been widely adopted in management science and time management as a genuine tendency of human behavior.
Parkinson’s original essay was chiefly concerned with a second, organizational form of the law: that the staff of a public administration grows year on year regardless of the amount of work to be done. He traced this to two forces. Officials prefer to multiply subordinates rather than rivals, and officials generate work for one another through internal memos and review. The characteristic growth rate he observed was 5–7% per year. This bureaucratic form of the law is the same dynamic that Brooks’s Law identifies from the other side: adding people to an organization increases the communication overhead between them, and that overhead itself becomes work.
The book also introduced the law of triviality, the observation that a committee spends its time in inverse proportion to the importance of the item under discussion. That idea now has its own entry as bike shedding.
Parkinson’s law has acquired a family of facetious corollaries. The best known is the Stock-Sanford corollary: "If you wait until the last minute, it only takes a minute to do." A software-flavored variant is the observation that data expands to fill the space available for storage, which tracks the same dynamic that drives software bloat and scope creep in a different medium.
The practical response to Parkinson’s law is to set shorter, firmer deadlines — to timebox work rather than let it find its own level. The timeboxed iterations of methods such as Scrum are partly a defense of this kind. The risk on the other side is artificial urgency: deadlines set without regard to the real size of the work produce the ninety-ninety rule rather than faster delivery.
See also
References
- Parkinson, Cyril Northcote (19 November 1955). "Parkinson’s Law". The Economist.
- Parkinson, Cyril Northcote (1958). Parkinson’s Law: Or the Pursuit of Progress. John Murray, London.