March 2019
Intermediate to advanced
256 pages
6h 6m
Japanese
Content preview from ITIL はじめの一歩 スッキリわかるITILの基本と業務改善のしくみ
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196
「変更」は、ITIL では次のように定義されています。
変更とは「
IT サービスに影響を及ぼす可能性のあるものを、追加、
修正、または削除すること」（出典「
ITIL 用語および頭字語集」）
「変更」を行った際に、
IT サービスの中断などの悪影響を及ぼさず、
スムーズに
IT サービスを継続するために行うのが「変更管理」です。
具体的には、例えば次のようなステップが求められます。
〇
サービスデスク（一次窓口）のサポート時間を変更する
〇
機能を追加する
〇
マニュアルを修正する
〇
新しいシステムを導入する
〇
バグ修正パッチを適用する
〇
Windows updateを全ての PC に配信する
〇
あまり使用されていないサービスを終了する
IT サービスに関わる変更を実施する際には、何が起こるかわからな
い（つまり、リスクが高い）ので、厳重な注意が必要です。
ROI（投資
対効果）を判断するのはもちろんですが、現行のサービス運用を中断
せず、さらにユーザーの混乱を本当に最小限に抑えて変更できるかど
うかをしっかり吟味してから進めるべきです。
CAB（変更諮問委員会）
これらを判断するには、技術的に詳しい技術者（IT部門の中の専門
的な技術者とサプライヤ）だけでなく、ユーザーに近いサービスデス
【サービストランジション（移行）】
変更管理
ITサービスを中断させずに有益な変更を実施できるよう管理する
ITIL
関連ページ
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P. 10 6
197
Chapter
05
クや運用メンバー、そしてユーザーの意見（利用者としての意見）や ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.