限制理论概念.pptx

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1、TOCConcept(觀念與概念)SystemA&SystemBComplexThemoreComplexaSystem,themoredegreesoffreedom/independentcauses.Belief:Therearenocomplexsystemsinreality(allpartsareinterdependentwithveryfew“leveragepoints”)SYSTEMASYSTEMBEverythingwithinasystemisconnectedbycauseandeff

2、ectrelationships-therearenocomplexsystemsinreality.WhatisTheoryofConstraints?providesasetofholisticprocessesandrules,allbasedonasystemsapproach,thatexploitstheinherentsimplicitywithincomplexsystemsthroughfocusingonthefewphysical&logical“leveragepoints”asaway

3、tosynchronizethepartstoachieveongoingimprovementintheperformanceofthesystemasawhole…基於系統的探討,提供一套完整的流程與方法,利用既有的簡單性在複雜的系統中找到著力點,以改善整體系統的效能Whatisasystem?Definition:asystemisasetofinterdependentcomponentsthatworktogethertoachieveagoalorobjective(asdeterminedbyth

4、eownersofthesystem).定義:系統是一群相互依存的各體或單位為達到一個目標而共同奮鬥TOCSystemThinkingEverysystemhasagoal.(每一系統皆有目標(Goal)要達成)Everysystemisexpectedtoimproveitsperformance(每一系統都被期望能夠改善其績效(相對於目標))Theabovetwostatementsarebaseforanysystemthinking(此兩項是任何系統思考的基礎)Everysystem’sperforma

5、nceislimitedbyitsconstraints每一系統的績效受限於限制或制約(constraint)Therefore,inordertoachievemoreunitsofthesystemgoalandimprovetheperformanceweshouldconcentrateontheconstraintofthesystem.(因此,要改善系統得到更多或更大的系統目標,我們需要專注於系統的限制)AcommercialSystemConstrain(系統限制)CapacityConstrai

6、ntaresourcewhichcannotprovidetimelycapacitythesystemsdemandsforthemTimeConstraintTheresponsetimeofthesystemtotherequirementofthemarketistoolongtotheextentthatitjeopardizesthesystem’sabilitytomeetitscurrentcommitmenttoitscustomersaswellastheabilityofwinningne

7、wbusinessMarketConstrainttheamountofcustomersordersarenotsufficienttosustaintherequiredgrowthofthesystemBehaviorConstrainttheattitude,actionsandperformanceofthehumanresourcesarenotsufficienttoguaranteethecurrentrequiredperformanceofthesystemnoritsrequiredgro

8、wthTOCisbasedon3basicassumptionsAssumption1Everythingwithinasystemisconnectedbycauseandeffectrelationships.Identificationofthecausesleadsustoconvergeontoanapparentcoreproblem/contradiction/confl