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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245
15
章
品質戦争：オープンソース対有償ソフト
ディオミディス・スピネリス（
Diomidis Spinellis
）
語るはやすい。コードを見せなさい。
―
Linus Torvalds
（ライナス・トーヴァルス）
開発者たちがオープンソースを有償ソフトと比較するときは、礼儀正しいディベートであるべきもの
が、非難合戦に堕落します。頭を冷やして客観的に比較する余地はたっぷりありますから、そうなる必
然性はないはずなのですが。
研究者は、さまざまな相補的なアプローチとの比較などを通じて、オープンソース開発プロセスの有
効性を検討しています。
●
1
つの手法として、コメントの密度やグローバル変数の利用などのコードの品質、つまりそのコー
ドの内部品質属性（
internal quality attributes
）を調べる方法があります［
Kuan et al. 2002
］。
●
別のアプローチは、ソフトウェアの外部品質属性（
external quality attributes
）を調べる、つまり
そのソフトウェアがエンドユーザにとってどのように見えるかを調べるものです［
Kuan 2003
］。
●
さらに、製品ではなく製作プロセスを観察して、コードの製作と保守に関係する指標を調べること
も可能です。どれだけの量のコードが毎週追加されているか、どれだけ迅速にバグが解決されるか、
などを調べるのです［
Paulson et al. 2004
］。
●
特定のシナリオについて議論するアプローチもあります。たとえば
Hoepman
と
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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.