本文對系統動態學(System Dynamics,簡稱SD) 中將因果關係圖轉換成何氏圖之演算法(algorithm)加以探討,介紹Burns演算法及Ramos演算法之步驟流程,說明其差異,並進一步提出修正,且舉一實例以驗證結果。 The algorithms for converting signed digraph to Forrester Schematics in system dynamics are discussed.The flowcharts of Burns algorithm and Ramos algorithm are introduced , and the differences between them are explained. Some modifications are proposed, and an illustrative example is given to verify the result.