Lean, Agile, and Extreme Programming

Short Description
The de facto standard Industry practice in most Software development teams is either chaotic or bureaucratic. The chaotic style chief characteristic is “Code and Fix”; while the bureaucratic style’s chief characteristic is waiting for someone else to complete a prerequisite tasks. Some of the indicators of either of these approaches are: a long integration phase, a long test phase, high defect counts.

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Content
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What is Agile?
Agile and Extreme Programming arose in the late 1990’s as a compromise between no control (chaos) and no movement (bureaucracy). The focus is on code delivery, but the approach is highly disciplined and professional.
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Agile is the name for a family of processes, which include Extreme Programming (XP), Scrum, and Crystal. Each process has it’s own guidelines for how to structure and complete programming work. They share a set of values expressed in figure 1.
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Lean Software Development
The Agile family of processes exists inside a larger approach to software development that is named Lean Software Development. The Lean approach brings the business model (implemented by Toyota, Wal-mart, South West Airlines, and others) and applies it to software development. Some fundamental tenants of Lean-Thinking are the elimination of waste and the focus on real customer value.
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