TOC限制理论精髓.ppt

Do?. Dr. Bülent Sezen Fundamentals of the Theoryof Constraints Do?. Dr. Bülent Sezen Introduction In recent years a rather unique and interesting approach to visualizing and managing an operation has emerged. Originally developed by Eliyahu M. Goldratt in his book The Goal, this Theory of Constraints has allowed many people to successfully rethink their approaches to improving and managing their production processes. Introduction Opinions about the Theory of Constraints differ. Some think that the Theory of Constraints (TOC) is a good way to improve process capability while using other control systems such as JlT or MRP, while others believe that TOC is a stand-alone approach completely unique and separate from other techniques. In this context, it is suggested that TOC can provide approaches to design, manage, schedule, and improve virtually any production system. Introduction… Still others believe it can be either just a process improvement approach or a complete system approach, depending on the extent of the implementation taken. It may not, in the opinion of this third group, be the most appropriate approach for certain business environments, while it may prove highly effective for other business environments. Fundamental Principlesof the Theory Of Constraints The fundamental concept behind the TOC is that every operation producing a product or service is primarily a series of linked processes. Each process has a specific capacity to produce the given defined output for the operation, and that in virtually every case there is one process that limits or constrains the throughput from the entire operation. The Linked Process Pipe Analogy Fundamental Principlesof the Theory Of Constraints… The analogy often used is that production flowing through operational processes is like liquid flowing through a pipeline. Each process has a certain defined capacity, illustrated in the analogy by the diameter of the associated pipe. In the diagram