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J Davies, VJ Marbin, JF Cox, The Theory of Constraints and Systems Dynamics: A Suitable Case for Multi-methodology

The TPs are constructed from three basic building blocks:

 * cause-effect sufficiency thinking
 * necessary condition thinking
 * a set of rules governing the logic-in-use

.

 * CRT, FRT, TrT are sufficiency-based ''if-then'' logic diagrams
 * PRT, EC are necessity-based "''in order to ..., we must ...''" logic structures