The principle of good enough is a rule for Software and systems design. It favours quick-and-simple (but potentially extensible) designs over elaborate systems designed by committees. Once the quick-and-simple design is deployed, it can then evolve as needed, driven by user requirements. Ethernet, the Internet protocol and the World Wide Web are good examples of this kind of design.

This kind of design is not appropriate in systems where it is not possible to evolve the system over time, or where the full functionality is required from the start.

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