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Exams400-007Questions#196
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400-007 · Question #196

400-007 Question #196: Real Exam Question with Answer & Explanation

The correct answer is A: Significant effort and time are required. The Waterfall model is a sequential, phase-gated methodology where scope is fixed after requirements are captured. Introducing changes after scope definition forces the project team to revisit completed phases, consuming significant extra effort and time.

Question

Various teams in different organizations within an enterprise are preparing low-level design documents to capture network parameters using a Waterfall project model: - hardware sizing and power consumption - Layer 2 and layer 3 services parameters - configuration of all control plane protocols Input from relevant stakeholders was captured at the start of the project, and the project scope has been defined based on the parameters above. What impact will it have on documentation and project deliverables if the stakeholders ask to have changes earned out in the network before the information has been captured?

Options

  • ASignificant effort and time are required
  • BRework is expected before the delivery
  • CThis provides more opportunity to think outside the box
  • DThis provides a flexible approach to incorporate changes

Explanation

The Waterfall model is a sequential, phase-gated methodology where scope is fixed after requirements are captured. Introducing changes after scope definition forces the project team to revisit completed phases, consuming significant extra effort and time.

Common mistakes.

  • B. While rework may occur, 'rework before delivery' understates the true impact - the primary consequence is the compounded effort and time cost of revisiting locked phases, not simply iterating on a deliverable.
  • C. Waterfall does not provide flexibility for creative re-scoping; unplanned changes violate the model's structured phase gates and do not represent an opportunity for innovative thinking.
  • D. A flexible approach to incorporating changes is a characteristic of Agile methodologies, not Waterfall, which explicitly resists scope changes once a phase is completed.

Concept tested. Waterfall model impact of late scope changes

Reference. https://www.pmi.org/learning/library/waterfall-software-development-methodology-7243

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