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Paradigms - models - methodologies - framework - life cyclesIn the 70's the waterfall model was the standard. In the 80's the iterative methods were popular. Projects still took longer than planned and and were over budget. We used to say that you estimated the time it would take to develop a system by doing your initial estimate then trippling it. In the 90's prototyping and something called rapid apps were introduced to try and shorten the time.
In 2001 the agile method was introduced, which provided a structure for some of these ideas.
Differences between Waterfall, Iterative Waterfall, Scrum and Lean Software Development (In Pictures!) | The Agilista PM
Scrum: The Art Of Doing Twice The Work In Half The Time: Amazon.com: , Jeff Sutherland, 2014
The Agile Manifesto: In February 2001, 17 software developers met at the Snowbird resort in Utah to discuss lightweight development methods. They published the Manifesto for Agile Software Development, in which they said that by "uncovering better ways of developing software by doing it and helping others do it," they have come to value Individuals and interactions over Processes and tools, Working software over Comprehensive documentation, Customer collaboration over Contract negotiation, and Responding to change over Following a plan.
Software development process - Wikipedia
What is ITIL (Information Technology Infrastructure Library)? - Definition from WhatIs.com
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