The request
“Create a government waterfall SDLC flowchart: start with requirements, progress through preliminary and detailed design, implementation, testing and deployment, require a review at each milestone, send rework back to the prior phase, then enter maintenance and close the project.”
Then tryAdd a security accreditation review before deployment.Add a procurement phase after requirements approval.
What is in this drawing
Read the decisions behind it.
01Gate approvals at each review
proceed to next phase or loop back for rework.
02Formal reviews
SRR, PDR, CDR, TRR, PRR.
03
Sequential, non-iterative lifecycle with strict phase dependencies.
When to reuse: for projects with fixed requirements, regulatory oversight, and well-defined milestones, such as government contracts, defense, aerospace, and large-scale infrastructure.
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