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November 20, 2004

プロジェクトの目標効果

どのプロジェクトでも、最初の段階で、
システム導入による目標を定義し、実現に向けて活動を行います。

しかし、設計・開発・テストと進むにつれて、
多くのプロジェクトで、スコープの見直しがあり、
プロジェクトの目標よりも、
とりあえずシステムを運用開始することが優先されるようになります。

そして、その場合、スコープの見直しにより、
どれだけの効果が削減されるのか見極める作業は行われません。

これらを防ぐためには、
プロジェクトの効果目標を定義するとともに、
それを実現するためのシステム機能を明確化しておく必要があります。
つまり、目標効果に対応するシステム機能を紐付けておくのです。

これには、以下の区別も付けられるメリットがあります。

 - プロジェクトの目標に直結するシステム機能(MUST)
 - ユーザの利便性などで設けられたシステム機能(WANT)

そして、スコープ変更や仕様変更があった場合には、
これらの一覧表をもとに、目標効果にどのように影響するかを試算するのです。

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