Under what conditions does the SDLC work best, in the context of systems development? Check all that apply.

Question

BlackTom AI · Accepted Answer

SDLC is a plan-driven, phased approach (requirements → design → build → test → deploy → maintain) that assumes stable scope and predictable technical tasks, so it performs best when requirements are clear and technical risk is low.

1. Relevant knowledge points and concepts
- SDLC (traditional/waterfall-style) emphasizes up-front requirements, sequential phases, formal documentation, and change control.  
- Technical risk refers to uncertainty about whether a design or technology will work as intended.  
- When requirements are stable and risk is low, changes are rare and the cost of late changes is manageable; when requirements or risks are high, iterative/agile approaches are preferable.

2. Step-by-step reasoning
- Step 1: SDLC relies on completing a requirements phase that drives all subsequent work. If requirements are well defined, downstream artifacts (design, code, tests) can be created reliably.  
- Step 2: Low technical risk means chosen technologies and architectures are well understood, reducing the chance of major rework discovered later.  
- Step 3: With both factors present, the sequential nature of SDLC minimizes overhead and provides clear milestones and controls.

3. Intermediate steps (logical breakdown)
- If requirements unclear → SDLC would lock in incorrect specs, leading to costly rework.  
- If technical risk high → failures surface late in the cycle, causing schedule/budget blowouts.  
- Therefore SDLC suits scenarios where neither of these negative conditions exists.

4. Why the correct answers are correct
- “Requirements well defined and understood” aligns with SDLC’s need for stable, up-front scope.  
- “Low technical risk and uncertainity [sic] is involved” (interpreted as low uncertainty) ensures technologies and designs are predictable and won’t force repeated iteration.

5. Why the other options are incorrect
- “Requirements and needs are uncertain” contradicts SDLC’s assumption of stable requirements.  
- “High technical risk and uncertainty is involved” means experiments and frequent feedback are needed—better handled by iterative/agile methods.

6. Conclusion
The best conditions for SDLC are that requirements are well defined and technical risk/uncertainty is low. This matches the provided answer.

Under what conditions does the SDLC work best, in the context of systems development? Check all that apply. 多项选择题

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