平成21年度秋期 ITパスポート試験問25

This question's explanation and your answers so far.

問25

頻出度★☆☆

ソフトウェアライフサイクルプロセスにおいて，システム化計画の立案で行うべき作業はどれか。

出典　平成21年度秋期 ITパスポート試験問25

解説

問 25

Incorrectア
Confirming business requirements and issues is work done in «formulating the system concept», the step before the system plan. That stage organizes the business strategy and needs and settles the purpose of building the system; formulating the plan starts only after taking those results as its premise.
Incorrectイ
Defining system requirements is work done in the «requirements definition process», which comes after the planning process. That step makes concrete the functions and performance the system must have, and at the stage of formulating the system plan the detail does not yet go that far.
ウ
正解 In the software lifecycle process (Common Frame), the planning process proceeds in the order of «formulating the system concept» → «formulating the system plan». Formulating the system plan is the step that turns the vision drawn up in the concept into an executable plan: it determines the scope of the target operations, the development structure and staffing, the schedule, the risks, and the prediction of the cost-effectiveness of the introduction, which is the basis for judging whether the investment pays off. Therefore ウ is correct.
Incorrectエ
Creating evaluation criteria for vendor companies is work related to «procurement (supplier selection)» when development is outsourced. The criteria are used to compare and evaluate proposals after a request for proposal (RFP) is issued, and they are not part of formulating the system plan itself.

ここがポイント

The planning process is divided into «formulating the system concept» (confirming business requirements and issues) and «formulating the system plan» (predicting cost-effectiveness and examining the structure, schedule, and risks).
The order of the steps is: planning → requirements definition → procurement and development. Remember that system requirements definition belongs to the requirements definition process, and creating vendor evaluation criteria belongs to procurement.

用語

解答問25ウ