This document discusses test-driven development (TDD) and its effectiveness. It reports on studies that measured the percentage of code covered by automated unit tests for different projects that used TDD to varying degrees. Projects with more extensive use of TDD had higher test coverage, ranging from 9% coverage up to 61% coverage. The document concludes that TDD can help improve software qualit
![TDDBC Nagoya Day1](https://cdn-ak-scissors.b.st-hatena.com/image/square/0376169601a5deec415e511eb03adb93da3ffed5/height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Ftddbcnagoyaday1-100711231552-phpapp02-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)