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2.6.2 Step 1: functions

The first step is to record what the asset does, including the target performance level in its present operating context. Recording a function has two specific benefits: (a) it allows an organisation to document the specifics of the assets’ responsibilities, and (b) at what level the function must perform. Functions can be split into two different categories: primary and secondary. The primary function is the system’s main purpose whilst the secondary functions are sub-functions which act alongside the primary function.