September 2011
Intermediate to advanced
612 pages
15h 48m
Japanese
Content preview from Making Software ―エビデンスが変えるソフトウェア開発
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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.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.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.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.
434
25
章 ソフトウェアの大半の欠陥はどこから生じる？
もう
1
つの重要な観察は、すべてのテストフェーズであらゆる分類の
MR
が発見されていることです。
コーディングの欠陥が一連のテストフェーズ全体を通じて見つかったのも、驚くようなことではありま
せん。この現象の明らかな理由の
1
つは、あちこちのテストフェーズの早い頃に見つかった欠陥を修正
するために、変更が連続的に行われているからでしょう。さらに、設計フェーズや要求フェーズの欠陥
もテストプロセス全体を通して見つけられ続けているというのは困ったことですが、これは要求や設計
に正確さと完全さが欠けているためであり、プロジェクト固有の問題というよりも、今日のソフトウェ
ア開発の在り方全般に見られる問題だと考えます。
図
25-2
の時間軸は固定区間で区切られています。データの形から明らかなのは、システムテストが
区間
t4
までオーバラップしていることです。残念ながら、私たちは日時データ（
MR
の開始や終了のデー
タ）しか記録で
きていません。工数データ（つまりその期間内に実際に作業に費した時間）との相関デー
タ［
Musa et al. 1987
］があると、とても価値があったと思われます。
図
25-2
時間経過による見つかった欠陥カテゴリ
6%
5%
4%
3%
2%
1%
t1
t2 t3
t4
要求の欠陥
設計の欠陥
コーディングの 欠 陥
t5
t6
0%
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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.