This standard accompanies “A Guide to Social Return on Investment (2012) and focuses on Principle 2. Within the context of all of the Principles of Social Value, “understand what changes” is pivotal. It is so closely intertwined with many of the other principles that it is essential it is applied well. The aim of the standard is to help you know how to collect the information you need about ‘changes’ and how to analyse this information in order to produce a set of well-defined outcomes. This standard is essential for anyone looking to maximise value and increase well-being, equality, and environmental stability.