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¸ñÂ÷01 ¼Ò°³ 1
º¥½É Á¦Ç°ÀÇ ¼Ò°³ Vensim Product Overview 1
º» ±³ÀçÀÇ ±¸¼º How this Guide is Organized 9
½Ç½À ¹× ¿¹Á¦ ÆÄÀÏ User¡¯s Guide Models 12
½ºÅ¸ÀÏ ±ÔÄ¢ Style Conventions 12
½ºÅ©¸° ¼¦ About Screen Shots 12
¸¶¿ì½ºÀÇ È°¿ë About the Mouse 13
02 º¥½ÉÀÇ ÀÎÅÍÆäÀ̽º 15
ŸÀÌÆ² ¹Ù Title Bar 16
¸Þ´º Menu 16
µµ±¸ ¹Ù Toolbar 17
VensimÀÇ ÀÛ¾÷â Vensim Windows 18
½ºÄÉÄ¡ µµ±¸ Sketch Tools 19
»óÅÂ ¸·´ë Status Bar 21
½Ã¹Ä·¹ÀÌ¼Ç Simulating 22
ºÐ¼® µµ±¸µé Analysis Tools 22
ºÐ¼® µµ±¸ °á°ú¹° Analysis Tool Output 25
ÄÁÆ®·Ñ ÆÐ³Î The Control Panel 27
¼ºê½ºÅ©¸³Æ® °ü¸® Subscript Control 28
03 ¿¹Á¦ ½Ç½À 29
¸ðµ¨ ºÒ·¯¿À±â Opening the Model 30
±¸Á¶ È®ÀÎ Examining Structure 31
¸ðµ¨ ½Ã¹Ä·¹ÀÌ¼Ç Simulating the Model 34
º¯È ÇàÅ ȮÀÎ Examining Behavior 35
Àΰú°ü°è ÃßÀû Causal Tracing 37
°³º°ÀûÀÎ ½Ã¹Ä·¹ÀÌ¼Ç ½ÇÇè Individual Simulation Experiments 41
»ç¿ëÀÚ Á¤ÀÇ ±×·¡ÇÁ ¸¸µé±â Making a Custom Graph 43
»ç¿ëÀÚ Á¤ÀÇÇ¥ ÀÛ¼ºÇϱâ Making a Custom Table 46
¿ä¾à Summary 48
04 ÀΰúÁöµµ 49
¸ðµ¨ ½ºÄÉÄ¡ Drawing Sketches 50
¸¶¿ì½º Ȱ¿ë ÆÁ Mouse Tips 51
ÀΰúÁöµµ ¼³°èÇϱâ Constructing a Causal Loop Diagram 51
ÇÁ·ÎÁ§Æ® ¸ðµ¨À» ÅëÇÑ ¿¹½Ã Project Model 51
ÀΰúÁöµµ ¼öÁ¤ Modifying diagrams 56
·¹À̾ƿô Á¤·Ä Sketch Layout 57
½ºÄÉÄ¡ °³Ã¼ ¿É¼Ç Sketch Options 58
ÄÚ¸àÆ®¿Í À̹ÌÁö Ãß°¡Çϱâ Adding Comments and Graphics 62
¸ðµ¨ °³¼± Refining the Model 64
¸ðµ¨ ½ºÄÉÄ¡ °á°úÀÇ ÀÎ¼â ¹× ³»º¸³»±â Printing and Exporting the Sketch 65
ÀΰúÁöµµ ±¸Á¶ ºÐ¼®Çϱâ Structural Analysis of Diagrams 66
Àΰú°ü°è ÃßÀû µµ±¸ Causal Tracing with Trees 67
05 Àú·®-À¯·®µµ 75
´ÙÀ̾î±×·¥ÀÇ ÀÛ¼º Building a diagram 75
Àú·® º¯¼öÀÇ ÀÔ·Â Entering Levels 75
À¯·® º¯¼öÀÇ ÀÔ·Â Creating Rates 76
À¯·® º¯¼öÀÇ ´ÙÀ̾î±×·¥ º¯Çü Bending Rate Pipes 78
º¸Á¶º¯¼ö¿Í È»ìÇ¥ÀÇ Ãß°¡ Adding Auxiliaries and Arrows 78
´õ ¸¹Àº ±¸Á¶ÀÔ·Â More Structure 80
´ÙÀ̾î±×·¥ÀÇ »ç¿ëÀÚ Á¤ÀÇ Customizing Diagrams 82
(1) ½ºÄÉÄ¡ ¿É¼Ç Sketch Options 83
(2) º¯¼öÀÇ ¸ð¾ç Variable Shapes 83
(3) ±âº» ½ºÄÉÄ¡ ¼³Á¤ Default Sketch Options 84
(4) ½ºÄÉÄ¡ ¿ä¼Òµé ¼û±â±â Hiding Sketch Elements 85
(5) ÀÛ¾÷ȸéÀÇ ¹èÀ² ¹× Å©±â º¯°æ Resizing & Rescaling Views 87
(6) ½ºÄÉÄ¡ µµ±¸ÀÇ ¼öÁ¤ Modifying the Sketch Tools 87
06 ½Ã¹Ä·¹ÀÌ¼Ç ¸ðµ¨ ±¸Ãà: Àα¸ ¸ðµ¨ 89
VensimÀÇ ±ÔÄ¢ Vensim Conventions 90
Åä³¢ Àα¸ ¸ðµ¨ Sketching the Rabbit Model 91
¼ö½ÄÀÇ ÀÔ·Â Writing Equations 92
¸ðµ¨ÀÇ ¼ö½Ä ¹× ´ÜÀ§ ¿À·ùÀÇ °ËÁõ Checking for Model Syntax and Units Errors 97
´ÜÀ§ ´ÜÀÏÈ Units Equivalents 97
¸ðµ¨ÀÇ ½Ã¹Ä·¹ÀÌ¼Ç Simulating the Model 98
¸ðµ¨ÀÇ ºÐ¼® Model Analysis 98
½Ã¹Ä·¹ÀÌ¼Ç °á°úÀÇ ºñ±³ Comparing Simulations 99
±âÇϱ޼öÀûÀÎ ¼ºÀå Exponential Growth 100
½Ã¹Ä·¹ÀÌ¼Ç ½ÇÇè Simulation Experiments 100
¿øÀκ¯¼ö ±×·¡ÇÁ Causes Strip Graph 102
¼öÇà°á°ú ºñ±³ Runs Compare 103
Áö¼öÇÔ¼öÀûÀÎ °¨¼Ò Exponential Decay 104
ÀÔ·Â-Ãâ·Â °³Ã¼ Input and Output Objects 105
07 ÇÔ¼ö¿Í ½Ã¹Ä·¹ÀÌ¼Ç ¿¡·¯ 109
°¡°Ý°ú ¼ö¿ä ¸ðµ¨ Price and Demand 109
ÇÔ¼ö½ÄÀÇ ÀÔ·Â Entering a Function 111
IF THEN ELSE 114
SMOOTH 115
STEP 117
Ãʱâ Á¶°Ç Initial Conditions 118
¸ðµ¨ÀÇ ¼ö½Ä Model Equations 119
½Ã¹Ä·¹ÀÌ¼Ç ¿À·ùÀÇ °Ë»ç Simulation Errors 121
(1) Zero ½Ã°£´ë¿¡¼ÀÇ ¿À·ù Errors at Time Zero 121
(2) ½Ã¹Ä·¹ÀÌ¼Ç ¼öÇൿ¾ÈÀÇ ¿À·ù ¹ß»ý Errors During the Simulation 123
(3) ¾Ë ¼ö ¾ø´Â ÆÄµ¿ÇüÅÂÀÇ º¯È Mysterious Oscillations 125
(4) ¿À·ùÀÇ ÅëÇÕ Errors Integrating 127
(5) ¸ðµ¨ÀÇ ¼öÁ¤ Model Corrections 127
(6) 0À¸·Î °ªÀ» ³ª´©´Â °Í¿¡ ´ëÇÑ ´ë󹿹ý Preventing Division by Zero 127
08 Lookup ±â´ÉÀ» Ȱ¿ëÇÑ ¸ðµ¨ °³¹ß 129
Åä³¢ ¼ºÀå¿¡ÀÇ ÇѰè Limits to Rabbit Growth 129
Lookup ÇÔ¼öÀÇ Ç¥ÁØÁ¤±ÔÈ Normalized Lookups 131
¸ðµ¨ ½ºÄÉÄ¡ Çϱâ Sketching the Model 132
¼ö½ÄÀÇ ÀÔ·Â Entering Equations 134
Ç¥ÁØÁ¤±ÔÈµÈ Lookup ÇÔ¼öÀÇ °³¹ß Creating and Normalizing Lookups 135
°ªÀÇ ÆíÁý Editing Values 137
¸ðµ¨ÀÇ ±¸¹®°ú ´ÜÀ§¿À·ùÀÇ Á¡°Ë Checking for Model Syntax and Units Errors 138
¸ðµ¨ÀÇ ½Ã¹Ä·¹ÀÌ¼Ç Simulating the Model 138
¸ðµ¨ÀÇ ºÐ¼® Model Analysis 139
º°µµÀÇ Ç¥ÁØÁ¤±ÔÈ º¯¼ö °ü¸® Separate Normalized Variables 139
½Ã¹Ä·¹ÀÌ¼Ç Simulation 141
Lookup ÇÔ¼ö°ªÀÇ º¯°æ Changing Model Lookups 142
Lookup ÇÔ¼öÀÇ ¸í¸í Named Lookups 143
09 ´ÙÁß ÀÛ¾÷ȸé 145
ÀÛ¾÷ ȸéÀÌ ÀÛµ¿ÇÏ´Â ¹æ¹ý How Views Work 145
°í°´ È®»ê ¸ðµ¨ Customer Diffusion Model 146
°í°´ È®»ê ¸ðµ¨ °³¹ßÇϱâ Building the Diffusion Model 146
¸ðµ¨ÀÇ ½Ã¹Ä·¹ÀÌ¼Ç Simulating the Model 149
¸ðµ¨ÀÇ ºÐ¼® Model Analysis 149
¸ðµ¨ÀÇ À̸§ºÎ¿© ¹× ÀúÀåÇϱâ Naming and Saving Your Model 150
»ý»ê¿ª·® ÀÛ¾÷ȸéÀÇ Ãß°¡ Adding the Capacity View 150
±×¸²ÀÚ º¯¼ö µµ±¸ Shadow Variable Tool 152
¼ö½ÄÀÇ Ãß°¡ Adding Equations 153
¼ö½ÄÀÇ ±³Ã¼ Altering An Equation 154
ÆÇ¸Å ¼öÀÍ ÀÛ¾÷ȸéÀÇ Ãß°¡ Adding a Sales Revenue View 154
Model Variable µµ±¸ Model Variable Tool 155
¶Ç ´Ù¸¥ ¼ö½Äµé More Equations 156
¸ðµ¨ÀÇ ½Ã¹Ä·¹ÀÌ¼Ç Simulating the Model 156
¸ðµ¨ÀÇ ºÐ¼® Analyzing the Model 157
¸ðµ¨ÀÇ ÀúÀå Saving Your Model 158
Á¤±³ÇÑ »ý»ê ¿ª·® ¸ðµ¨ Detailed Capacity Model 158
º¹»çÇϱâ¿Í ºÙ¿© ³Ö±â Copying and Pasting 158
»ý»ê¿ª·® ÀÛ¾÷ȸéÀÇ ¼ö½Ä Capacity View Equations 162
µ¿ÀÏ ´ÜÀ§ Units Synonyms 163
¸ðµ¨ÀÇ ½Ã¹Ä·¹À̼ǰú ºÐ¼® Simulating and Analyzing the Model 163
»ý»ê ¿ª·® ÅõÀÚ Á¤Ã¥ Capacity Investment Policy 164
10 °á°ú¹° ÆíÁýÇϱâ 167
±×·¡ÇÁ¿Í ½ºÆ®¸³ ±×·¡ÇÁ Graphs and Strip Graphs 167
¸¶Å·Ç¥½Ã¸¦ Ȱ¿ëÇÑ ±×·¡ÇÁ Graphs Lines with Markers 171
Æ®¸® ´ÙÀ̾î±×·¥ Tree Diagrams 173
»ç¿ëÀÚ Á¤ÀÇ ±×·¡ÇÁ Custom Graphs 174
»ç¿ëÀÚ Á¤ÀÇ Å×À̺í Custom Tables 177
11 VensimÀÇ °ÔÀÓ ±â´É 181
ºÎµ¿»ê °ÔÀÓ The Real Estate Game 181
¸ðµ¨ ±¸Á¶ Model Structure 181
³»Àå ÇÔ¼ö Built-in Functions 183
WIP ±×·¡ÇÁ WIP Graph 184
°ÔÀÓ º¯¼ö Ãß°¡Çϱâ Adding Game Variables 185
¸ðµ¨ÀÇ ½Ã¹Ä·¹ÀÌ¼Ç Simulating the Model 186
°ÔÀÓ ¸ðµå ¼öÇà Playing the Game 187
°ÔÀÓ¿¡¼ ¾ÕÀ¸·Î À̵¿ Moving Forward in a Game 188
°ÔÀÓÀÇ ¹é¾÷ Backing Up in a Game 190
12 ÀÔ·Â Ãâ·Â °ü¸® 191
±¸Àü È®»ê¿¡ ÀÇÇÑ ÆÇ¸Å ¸ðµ¨ Word of Mouth Sales 191
wom1.mdl ¸ðµ¨ÀÇ ¼ö½Ä wom1.mdl Equations 192
Ãâ·Â ¼³Á¤ Output Controls 194
ÀÔ·Â ¼³Á¤ Input Controls 196
°ÔÀÓ ¼³Á¤ Gaming Control 199
¸ðµ¨ ÃâÆÇÇϱâ Publishing the Model 202
(1) °ÔÀÓ °£°Ý Game Interval 202
(2) ÇØ¼³ ¹× ³×ºñ°ÔÀÌ¼Ç ¸µÅ© Commentary and Navigation Links 202
(3) Å×½ºÆ® ÇØº¸±â Test It Out 205
(4) ÆÐŰÁö ÃâÆÇÇϱâ Publish a Package 206
13 SyntheSim 209
´Ü¼øÇÑ ±ººñ°æÀï ¸ðµ¨ Simple Arms Race Model 209
»õ·Î¿î ´ÙÀ̾î±×·¡¹Ö New Diagramming Flourishes 210
ÃÖ¼Ò°ª, ÃÖ´ë°ª ±×¸®°í Áõ°¡ºÐ Min, Max and Increment 212
¸ðµ¨ÀÇ ¼ö½Ä Model Equations 213
±¸Á¶, ÇàÅ ±×¸®°í ¼Óµµ Structure, Behavior and Speed 215
ÇàÅ º¸¿©ÁÖ±â Showing Behavior 215
½Ã¹Ä·¹ÀÌ¼Ç ¸¸µé±â Making Simulations 216
Lookups°ª º¯È ½Ã۱â Changing Lookups 220
µµ±¸ ¸ðÀ½À¸·ÎºÎÅÍ º¯È½Ã۱â Changing from the Toolbar 221
½Ã¹Ä·¹ÀÌ¼Ç ½ÇÇèÇϱâ Doing Simulation Experiments 221
¼öÇà°á°ú ºÒ·¯¿À±â¿Í ³»º¸³»±â Loading and Unloading Runs 223
Çǵå¹é ·çÇÁ Áß´Ü Breaking Feedback Loops 224
(1) ±ººñ°æÀï Áß´Ü Stopping the Race 224
(2) Overriding º¯È ÇàÅ Overriding Behavior 225
ÄÁÆ®·Ñ ÆÐ³Î ¼³Á¤ ¸¸µé±â Building a Control Panel 226
¼ºê½ºÅ©¸³Æ®¿Í SyntheSim ¸ðµå Subscripts and SyntheSim 228
14 Ÿ´ç¼º °ËÁõ 231
¸ðµ¨°ú Ÿ´ç¼º Models and Reality 231
Àü¹®ÀûÀÎ ¿µ¿ª Domains of Expertise 233
Ÿ´ç¼º °ËÁõ ¼ö½ÄÀÇ Á¤ÀÇ Defining Reality Check Equations 233
ÀԷ°ªÀÇ Å×½ºÆ® Test Inputs 234
Á¦¾àÁ¶°Ç Constraints 235
½Ã¹Ä·¹À̼ǰú Ÿ´ç¼º °ËÁõ Simulation and Reality Check 240
Ȱ¼ºÈµÈ Á¦¾àÁ¶°ÇÀÇ °Ë»ç Active Constraint Checking 240
¼öµ¿ÀûÀÎ Á¦¾àÁ¶°ÇÀÇ °Ë»ç Passive Constraint Checking 241
¿À·ùÀÇ º¸°í Error Reporting 241
Ÿ´ç¼º °ËÁõ ¼ö½ÄÀÇ ÀÔ·Â Entering Reality Check Equations 241
¼ö½Ä ÆíÁý±â Equation Editor 243
Ÿ´ç¼º °ËÁõÀÇ ¼öÇà Running Reality Check 244
Ÿ´ç¼º °ËÁõ µµ±¸ The Reality Check Tool 246
Ÿ´ç¼º °ËÁõ °á°ú Reality Check Results 247
½Ã¹Ä·¹ÀÌ¼Ç °á°úÀÇ È®ÀÎ Reviewing Simulation Results 247
Ÿ´ç¼º °ËÁõ°ú È¿¸ðÀÇ ¼ºÀå Reality Check and Yeast Growth 248
(1) Test Input°ú Á¦¾àÁ¶°ÇÀÇ ¼ö½Ä Test Input and Constraint Equations 248
(2) Ãʱ⠸𵨠An Initial Model 251
(3) ¿Âµµ, ºÐ¿ ¹× »ç¸ê Temperature, Divisions and Terminations 255
(4) ¹°°ú ¼³ÅÁ¿¡ ¿µÇâÀ» ¹Þ´Â ºÐ¿ Divisions as influenced by Water and Sugar 256
(5) ¹°°ú ¼³ÅÁ¿¡ ¿µÇâÀ» ¹Þ´Â ºÐ¿ Water and Sugar as Influenced by Divisions 258
°á·Ð Conclusion 259
15 ¹Î°¨µµ ºÐ¼® 261
½ÃÀå ¼ºÀå ¸ðµ¨ Market Growth Model 261
¸óÅ×Ä«¸¦·Î ½Ã¹Ä·¹ÀÌ¼Ç Monte Carlo Simulations 262
Sales.mdl ¸ðµ¨ÀÇ ¼ö½Ä Sales.mdl Equations 263
±âº» ½Ã¹Ä·¹ÀÌ¼Ç Base Simulation 264
¿©·¯°³ÀÇ ÆÄ¶ó¹ÌÅÍ °ªÀÇ ºÒȰ½Ç¼º Uncertainty in Multiple Parameters 264
¹Î°¨µµ ºÐ¼® º¯¼ö ¼³Á¤ Sensitivity Control Parameters 265
¹«ÀÛÀ§ ´ÜÀÏºÐÆ÷ Random Uniform Distribution 266
¹«ÀÛÀ§ Á¤±ÔºÐÆ÷ Random Normal Distribution 268
ÀúÀå ¼³Á¤ ȯ°æ Save Lists 269
¹Î°¨µµ ºÐ¼® ½Ã¹Ä·¹ÀÌ¼Ç Sensitivity Simulations 270
¹Î°¨µµ ºÐ¼® ½Ã°è¿ ±×·¡ÇÁ Time Graph Sensitivity Output 270
½Å·Ú±¸°£ Confidence Bounds 270
¹Î°¨µµ ±×·¡ÇÁ ÀÚ¼¼È÷ º¸±â Focusing Graph Scales 272
°³º° °á°ú ÃßÀûÇϱâ Individual Traces 272
¹Î°¨µµ ºÐ¼® °á°ú È÷½ºÅä±×·¥ Histogram Sensitivity Output 273
±âº» ºÐ¼® µµ±¸¸ðÀ½ÀÇ º¯°æ Changing the Default Analysis Toolset 274
Åë°èºÐ¼® µµ±¸ Stats Tool 275
16 ¸ðµ¨¿¡¼ µ¥ÀÌÅÍ »ç¿ë 277
µ¥ÀÌÅÍ »ç¿ëÀÇ À¯Çü Types of Data Use 277
µ¥ÀÌÅÍ ÀÔ·ÂÀ» À§ÇÑ ¸ðµ¨ Using Data to Drive a Model 278
½ºÇÁ·¹µå ½ÃÆ®ÀÇ µ¥ÀÌÅ͸¦ °¡Á®¿À±â Getting Data from a Spreadsheet 279
½Ã¹Ä·¹ÀÌ¼Ç Simulating 280
°¡Á®¿Â µ¥ÀÌÅ͸¦ º¯¼ö·Î »ç¿ëÇÏ´Â ¹æ¹ý Data Variable with Imported Data 282
ÅØ½ºÆ® ±â¹ÝÀÇ µ¥ÀÌÅÍ °¡Á®¿À±â Importing Text-Formatted Data 283
½Ã¹Ä·¹ÀÌ¼Ç Simulation 284
½ºÇÁ·¹µå ½ÃÆ® µ¥ÀÌÅÍ °¡Á®¿À±â Importing Spreadsheet Data 288
½Ã¹Ä·¹ÀÌ¼Ç Simulation 291
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±âº» ¸ðµ¨ »ìÆìº¸±â A Simple Project Model 294
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