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.
24
2
章 信頼性〜なぜ確信できなくてはいけないか
?
たとえば
RDBMS
上のトランザクション負荷のための
TPC-C
ベチマークなどに対しては、懐疑的な意
見も多くあります。
限界とバイアス
高品質のエビデンスでさえ大抵は部分的なものです。現象は直接評価できないのが普通ですから、私
たちは、その現象の帰結で評価可能なものを調査したり、現象の一部だけを調べたり、現象を特定の観
点から観察したり、関心事項に何らかの形で関連していることを期待して測定可能な別のものを観察し
ます。測定メトリクスは現象をお手軽かつ簡潔に表現ないし反映したものです。しかし、測定メトリク
スは多くの場合、現象そのものではなく、簡単化されたものです。高い信頼性のためには、メトリクス
選択の妥当性を示す必要があります。
さらに悪いのは、エビデンスにはバイアスがかかっている可能性があることです。昔ながらの中性洗
剤の広告（「○○ならもっとたくさんのお皿がピカピカに……」）で示される「ブラインドテスト」
や消費
者実験の類に確信を持てるソフトウェア技術者が一体何人いるでしょう。広告規制法では、このような
消費者実験は条件比較ができるようにするための一定の基準に従わなくてはいけないことになっていま
す。同じ汚れで、同じ水と、同じ量の洗剤を使うことなどです。しかし広告主の方は、その条件を思う
ままに作ることができるので、汚れの種類や水の温度などの事項を自社商品向けに最適化したりします。
「はあ？」ですよね、「バイアスが組み込まれているじゃない」。しかし、ソフトウェア工学の手法やツー ...
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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.