Software Design X-Rays by Adam Tornhill

Author:Adam Tornhill
Language: eng
Format: epub
Tags: Pragmatic Bookshelf
Publisher: The Pragmatic Bookshelf, LLC

Measure Coordination Needs

There’s a difference between code developed by a single individual versus code that’s more of a shared effort by multiple programmers and, thus, in need of coordination. Excess coordination needs correlate directly to increased lead times. What’s more surprising is that there may be a long-term cost, too, as our organizational patterns impact code quality in terms of defects.

In a groundbreaking study, researchers at Microsoft used organizational metrics such as the number of authors, the number of ex-authors, and organizational ownership to measure how well these factors predict the failure proneness of the resulting code. The research shows that organizational factors are better predictors of defects than any property of the code itself, be it code complexity or code coverage. (See The Influence of Organizational Structure on Software Quality [NMB08] for the research.) Let’s use these insights to uncover the contribution patterns of individual authors with an example from the Linux kernel.

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