問14
頻出度★☆☆
企業の情報システム戦略に基づいてシステム化計画を策定するときに決定するものはどれか。
平成26年度 秋期 ITパスポート試験 問14
ストラテジ系システム企画 › システム化計画
This question's explanation and your answers so far.
解説
問 14
- ア
正解 Formulating a systemization plan is a step in the planning process that takes the information systems strategy and turns each systemization concept into an executable plan. What is decided here are planning-level matters about how the whole project will proceed: the scope of the target business operations, the overall development schedule, the development organization and staffing, rough cost estimates and return on investment (cost-effectiveness), and risk analysis and countermeasures. The development schedule in choice ア is exactly one of these central decisions: the overall timetable of what scope is to be developed, migrated, and put into operation by when is fixed at the planning stage and then serves as the baseline for the later requirements definition, development, and operation. The correct answer is therefore ア.
Incorrectイ
Business objectives are decided when the management strategy is formulated, and the information systems strategy is drawn up in order to realize those business objectives and that strategy. In other words, business objectives are a premise, an input, for the systemization plan, not something decided within the plan. This choice reverses the order, and that is why it is wrong.
Incorrectウ
The input/output screen layout is a concrete specification decided in the design activities of the development process that follow requirements definition (external design, such as screen design and report design). Screens are not worked out in that much detail at the planning stage; the granularity is far finer than that of a systemization plan.
Incorrectエ
The hardware configuration is an implementation-level matter decided in system architecture design (system design), after requirements definition. At the systemization plan stage, rough assumptions may be made as a basis for estimating approximate costs, but this is not the step in which the equipment configuration itself is finalized.
ここがポイント
- Planning process = drafting the systemization concept + formulating the systemization plan. What the systemization plan decides are planning matters concerning how the whole project proceeds: the target business scope, the overall development schedule, the development organization and staffing, rough costs and return on investment, risk analysis, and the like.
- Fix the order of the phases in mind: management strategy (business objectives) → information systems strategy → planning (systemization concept and systemization plan) → requirements definition → development (hardware configuration in system architecture design, screen layout in external design) → operation and maintenance. Which phase a decision belongs to is what makes a choice right or wrong.
用語