For some types of changes, there are established methods for identifying and screening options. For example, for heat recovery, pinch analysis has become the tool of choice (Chapter 26).
Evaluation of steam balances is also a good way to identify inefficiencies in steam systems and develop projects to address them (Chapter 18).
However, in many cases, the best ways to find opportunities involve various types of process review, knowledge sharing, and brainstorming (Chapter 25).