WITNESS制造仿真手册
TABLE OF CONTENTS
1 Conducting a simulation project ..............................................................7
Establish objectives ......................................................................................8
Scope and level of model detail....................................................................9
Data collection............................................................................................10
Structuring the model .................................................................................11
Building the model ......................................................................................11
Running the model .....................................................................................11
Generating reports......................................................................................12
Testing the model .......................................................................................13
Experimentation..........................................................................................13
Documentation ...........................................................................................15
Presentation of results and implementation ...............................................15
2 Modeling with WITNESS..........................................................................16
Elements: the WITNESS building blocks....................................................16
Discrete elements .................................................................................17
Continuous processing elements..........................................................20
Logical elements & Modules .................................................................21
Graphical & Reporting elements ...........................................................23
Manipulating elements-Rules, Expressions and Actions ............................24
Building and using the WITNESS model ....................................................25
Running the model................................................................................26
Reports: measuring performance .........................................................26
The WITNESS Product Family .............................................................27
WITNESS Model Storage Formats .......................................................29
Help.......................................................................................................29
Enhancing the screen display.....................................................................30
3 Example models.......................................................................................32
Dem1.mod – Simple Assembly Operation..................................................32
Dem2.mod – Simple Logistics Model .........................................................37
Model Gallery – Sample WITNESS models ...............................................39
4 Example - building a model.....................................................................43
Introduction.................................................................................................43
Stage 1 .......................................................................................................44
Stage 2 .......................................................................................................48
Stage 3 .......................................................................................................53
Stage 4 .......................................................................................................56
Summary ....................................................................................................60
5 Case study: JETTY.MOD..........................................................................61
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