Process Reuse is a driving principle for designing business processes to be unitary for a number of related purposes. It is aimed to adapt more as possible components to be reused for different goals within one business function, so it will help companies to economize on planning, documenting and controlling business processes as the differences between them will be just minimal as necessary. In other words Process Reuse stands for minimizing number of independent, but still related, processes by merging them with each other to be held as a smaller number of unitary processes sharing the common schemas, controls, measures and documents.
Process Reuse example can be given with a Sales Process: the ways to sell to private customers and to corporate clients can be very different in their details. Each way has its own essential traits, but on the general level they are the same Sales Process with the same major steps, hence there is no sense to treat them as two different processes, but it really makes sense to merge these two ways into a sole process which supports a variability of actions and tools, while major common elements can be seamlessly shared and utilized as organic parts of the unitary body of the Sales Process being driven by a single set of controls, measures and regulations.