Much of the time we spend with technical documentation is concerned with wayfinding. That is, it is not about performing the actual operation, but about finding which operation to perform, and finding the piece of content that describes the operation in a form that we can understand.
Note that there are two distinct components to this description of wayfinding. It is tempting to think of wayfinding purely in terms of finding the right piece of content. But simple content wayfinding really applies only in cases where the user it thumbing through a well known and well used reference work. That is, in cases where we know exactly what we are looking for, and merely have to locate an individual data point.