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Spiral Model

Updated 06 Sep 2026

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What it is
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  a process model combining iterative development with explicit, dedicated risk management at every cycle
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Steps (per iteration)
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  identification — initial requirements analysis
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  design — design based on current requirements
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  build & evaluation — implement a prototype and evaluate it
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  risk analysis — identify risks and mitigations
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  repeat — the cycle continues until the final product is reached
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Strenghts / weaknesses
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  good fit for large, complex, high-risk projects (e.g. security systems, aerospace); risk is addressed at every phase
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  costly due to repeated iteration; complex to manage for small projects
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Related
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  Waterfall Model
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  Risk
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References
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  https://en.wikipedia.org/wiki/Spiral_model
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  https://www.geeksforgeeks.org/software-engineering/software-engineering-spiral-model/

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