The Principle of Symmetric Change

The Principle of Symmetric Change

December 3, 2010 Off By Requirements Management

Many of the most common problems people have with implementing BDD or agile acceptance testing come from a misalignment of conceptual models. By changing our view at the specifications/tests we can make most of those issues go away instantly. This post explains the principle of symmetric change: one small change in a business model should require one small change to executable specifications.