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Ninety-ninety rule

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In computer programming and software engineering, the ninety-ninety rule is a humorous aphorism that states: This adds up to 180%, in a wry allusion to the notoriety of software development projects significantly over-running their schedules (see software development effort estimation). [1]

12 relations: Agile software development, Aphorism, Bell Labs, Communications of the ACM, Computer programming, Hofstadter's law, Jon Bentley (computer scientist), Lindy effect, Pareto principle, Small matter of programming, Software development effort estimation, Software engineering.

Agile software development

Agile software development describes an approach to software development under which requirements and solutions evolve through the collaborative effort of self-organizing and cross-functional teams and their customer(s)/end user(s).

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An aphorism (from Greek ἀφορισμός: aphorismos, denoting "delimitation", "distinction", and "definition") is a concise, terse, laconic, and/or memorable expression of a general truth or principle.

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Bell Labs

Nokia Bell Labs (formerly named AT&T Bell Laboratories, Bell Telephone Laboratories and Bell Labs) is an American research and scientific development company, owned by Finnish company Nokia.

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Communications of the ACM

Communications of the ACM is the monthly journal of the Association for Computing Machinery (ACM).

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Computer programming

Computer programming is the process of building and designing an executable computer program for accomplishing a specific computing task.

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Hofstadter's law

Hofstadter's law is a self-referential time-related adage, coined by Douglas Hofstadter and named after him.

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Jon Bentley (computer scientist)

Jon Louis Bentley (born February 20, 1953 in Long Beach, California)Biography from.

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Lindy effect

The Lindy effect is a concept that the future life expectancy of some non-perishable things like a technology or an idea is proportional to their current age, so that every additional period of survival implies a longer remaining life expectancy.

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Pareto principle

The Pareto principle (also known as the 80/20 rule, the law of the vital few, or the principle of factor sparsity) states that, for many events, roughly 80% of the effects come from 20% of the causes.

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Small matter of programming

In software development, small matter of programming (SMOP) or simple matter of programming is a phrase used to ironically indicate that a suggested feature or design change would in fact require a great deal of effort; it often implies that the person proposing the feature underestimates its cost.

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Software development effort estimation

Software development effort estimation is the process of predicting the most realistic amount of effort (expressed in terms of person-hours or money) required to develop or maintain software based on incomplete, uncertain and noisy input.

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Software engineering

Software engineering is the application of engineering to the development of software in a systematic method.

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90-90 Rule, 90-90 rule, 90/90 rule, Ninety ninety rule, Ninety-Ninety Rule.


[1] https://en.wikipedia.org/wiki/Ninety-ninety_rule

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