Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.

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Deliver working software frequently, from a couple of weeks to a couple of months, with a preference to the shorter timescale.

Build projects around motivated individuals. Give them the environment and support they need, and trust them to get the job done.

Working software is the primary measure of progress.

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Continuous attention to technical excellence and good design enhances agility.

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The best architectures, requirements, and designs emerge from self-organizing teams.

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Welcome changing requirements, even late in development. Agile processes harness change for the customer’s competitive advantage.

Business people and developers must work together daily throughout the project.

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The most efficient and effective method of conveying information to and within a development team is face-to-face conversation.

Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely.

Simplicity–the art of maximizing the amount of work not done–is essential.

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At regular intervals, the team reflects on how to become more effective, then tunes and adjusts its behavior accordingly.

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