Tricotyledon theory of system design

In systems engineering, the tricotyledon theory of system design (T3SD) is a mathematical theory of system design developed by A. Wayne Wymore.[1] T3SD consists of a language for describing systems and requirements, which is based on set theory, a mathematical systems model based on port automata, and a precise definition of the different types of system requirements and relationships between requirements.

System requirements modelEdit

  • I/O requirement
  • Performance requirement
  • System test requirement
  • Cost requirement
  • Tradeoff requirement

System designEdit

  • Based on set theory
  • Transition systems
  • Functional system design
  • Buildable system design


  1. ^ Wymore, A. Wayne (1993). Model-Based Systems Engineering. CRC Press, Inc. ISBN 084938012X. CS1 maint: discouraged parameter (link)