Pre-Requisite Tree (PRT)

The PRT is a diagram describing the major milestones leading to the successful implementation of the injection. The milestones are connected to each other through Necessity Logic.

By relying on everybody’s “expertise” at pointing out obstacles, the PRT enables dissection of the implementation tasks into an array of interrelated, well-defined, Intermediate Objectives.


Source: Oded Cohen and Jelena Fedurko, Theory of Constraints Fundamentals, 2012