In the traditional systems development life cycle, each stage must be completed before the next stage begins.

Question

BlackTom AI · Accepted Answer

The Waterfall model describes a strictly sequential SDLC in which phases like requirements, design, implementation, testing, deployment and maintenance follow one another in order. However, the broader, traditional concept of the systems development life cycle (SDLC) is not limited to a single strictly linear model.

1) Relevant knowledge points and concepts
- SDLC phases: planning/feasibility, requirements/analysis, design, implementation/coding, testing, deployment, maintenance.
- Waterfall model: a linear, phase-complete-before-next approach.
- Other traditional SDLC variants (iterative, prototyping, spiral) allow revisiting earlier phases and overlapping activities.

2) Step-by-step reasoning
- The statement equates “traditional SDLC” with the strict Waterfall rule that “each stage must be completed before the next begins.”
- While Waterfall embodies that rule, traditional SDLC practice historically and practically includes iterative and overlapping approaches: requirements may be refined after prototyping; testing often discovers defects that require returning to design or coding; maintenance can feed new requirements back into analysis.
- Therefore, saying each stage must be completed before the next begins overgeneralizes and mischaracterizes SDLC as a single, rigid model.

3) Intermediate logical steps (no numeric calculations required)
- Identify the specific model implied by the statement (Waterfall).
- Contrast with common SDLC practices and models that permit iteration and phase overlap.
- Conclude that the universal claim (“each stage must be completed…”) is false when applied to “the traditional SDLC” as a whole.

4) Why the correct answer is correct
- The statement is false because the traditional SDLC includes both sequential and iterative methods; in practice, stages often overlap or repeat based on feedback, prototyping, and testing results.

5) Why the other option is incorrect
- “True” would only be correct if the question specifically named the Waterfall model. Applying “each stage must be completed” universally to all traditional SDLC approaches is incorrect.

Conclusion: The correct answer is False, which matches the provided answer.

In the traditional systems development life cycle, each stage must be completed before the next stage begins. 判断题

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