There is always talk about what the customer wants versus what the customer needs. Talk about capturing requirements, turning those requirements into outcomes. Talk of describing how the customer comes to understand what is needed for success.
The US Department of Defense has developed a concept that can be directly applied to enterprise class projects.
This method involves a functional analysis of operational requirements. Capabilities are identified based on the tasks required… Once the required capability inventory is defined, the most cost effective and efficient options to satisfy the requirements are sought.
The concept of Capabilities Planning means
Planning, under uncertainty, to provide capabilities suitable for a wide range of challenges and circumstances while working within an economic framework that necessitates choice.