問39
頻出度★★★
ソフトウェアの開発に当たり, 必要となる作業を階層構造としてブレークダウンする手法はどれか。
平成29年度 春期 ITパスポート試験 問39
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This question's explanation and your answers so far.
解説
問 39
Incorrectア
CMM (Capability Maturity Model) is a model for evaluating and improving the process maturity of a software development organization across five levels; it is not a method for breaking work down into a hierarchical structure, so it is incorrect.
Incorrectイ
ITIL (Information Technology Infrastructure Library) is a set of guidelines compiling best practices for IT service management; it is not a method for breaking work down into a hierarchical structure, so it is incorrect.
Incorrectウ
PERT is a method for planning and analyzing schedules based on the sequence and duration of tasks, used to find the critical path on an arrow diagram. It is not a method for breaking work down into a hierarchical structure, so it is incorrect (it is a separate method used at the stage of scheduling the tasks that WBS has identified).
- エ
正解 The correct answer is “エ”, WBS. WBS (Work Breakdown Structure) is a method that progressively breaks down the work required in a project (deliverables and tasks) from larger units into smaller ones, organizing them into a tree-like hierarchical structure. It exactly matches the question's description of a method that breaks the required work down into a hierarchical structure, so エ is correct. WBS helps prevent work from being overlooked and clarifies the basic units for effort estimation and progress management (work packages).
ここがポイント
- WBS (Work Breakdown Structure) = a method that hierarchically breaks down the work required for a project from higher to lower levels and organizes it as a tree structure. It is the basis for preventing overlooked work and for effort estimation and progress management.
- Distinguishing confusable acronyms: CMM = process maturity model, ITIL = a collection of best practices for IT service operation, PERT = a schedule planning and analysis method. Their purposes differ, so do not confuse them.
用語