Weaknesses of the spiral model - Project management (PMP)

Explain the weaknesses of the spiral model.

Weaknesses of Spiral model are:

a) Not suitable for smaller or low budget projects as cost is high for identifying risks.
b) Time spent on risks, planning, and prototyping may not be as efficient
c) It is complex
d) Spiral may continue indefinitely.
e) Hard to define clear milestones, which allow the SDLC to move to the next phase.
f) Developers must have other work during non development phases.
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