Spiral Methodology

 

The spiral methodology fixes some of the problems introduced by the waterfall methodology. The spiral methodology still has the four phases. A little time is initially spent in each phase followed by several iterations over all four phases.

Simply, the methodology iterates over the processes of think a little, plan a little, implement a little, then test a little. The document structure or deliverable types from each phase do not change in structure but the content is very dynamic. As the methodology progresses more detail is generated. Finally, after several iterations, the product is complete and ready to ship.

Each phase is given equal treatment. See Figure  on page  .

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Figure: The Spiral Methodology

• Why It Works
• Why It Does Not Work