turtles-own [red-peppers] patches-own [countdown rot-time] globals [red-crates] to setup clear-all setup-turtles set red-crates 0 ask patches [ set pcolor green set countdown number-of-countdown set rot-time number-of-rot-time ] end to setup-turtles crt number-of-harvesters [ setxy random-xcor 16 set shape "person farmer" set heading 180 ] end to go tick move-turtles grow-red-peppers pick-red-peppers check-death pepper-rot end ; The agents need to move to be able to harvest the peppers in the greenhouse to move-turtles ask turtles [ right random 0 forward 1 if not can-move? 1 [ rt 90 jump random 3 rt 90 ]] end ; The peppers need to become red to be ready to be harvested to grow-red-peppers ask patches [ if countdown > 0 [ if pcolor = green [ if random 100 < 4 [ set pcolor red ]]]] ask patches [ if countdown = 0 [ set pcolor white ]] end ; The turtles need to change some parameters of the patch and the monitor to harvest the pepper to pick-red-peppers ask turtles [if pcolor = red [ set countdown (countdown - 1) set pcolor green set red-peppers (red-peppers + 1) set rot-time number-of-rot-time] ifelse show-red-peppers? [ set label red-peppers ] [ set label "" ]] end ; If the turtles have gathered 10 peppers, they need to jump to the first line again and start harvesting peppers again to check-death ask turtles [ if red-peppers = 10 [ set red-peppers red-peppers - 10 set red-crates red-crates + 1 hatch 1 [ set red-peppers 0 setxy random-xcor 16 set shape "person farmer" set heading 180 ] die ] ] end ; If the peppers are not harvested in time, the peppers are rotting to pepper-rot ask patches [ if pcolor = red [ set rot-time rot-time - 1 ] if rot-time = 0 [ set pcolor green set countdown countdown - 1 set rot-time number-of-rot-time]] end ; At the end the harvesters are just running hard but not harvesting anything. Solution: let the harvesters die out slowly when there are less peppers and let the rest run harder ; because there is less to harvest or just stop at a certain moment when it is not feasible anymore to keep running. @#$#@#$#@ GRAPHICS-WINDOW 361 10 800 470 16 16 13.0 1 10 1 1 1 0 1 0 1 -16 16 -16 16 0 0 1 ticks CC-WINDOW 5 484 809 579 Command Center 0 BUTTON 32 36 95 69 NIL setup NIL 1 T OBSERVER NIL NIL NIL NIL BUTTON 109 36 172 69 NIL go T 1 T OBSERVER NIL NIL NIL NIL SLIDER 33 87 205 120 number-of-harvesters number-of-harvesters 0 200 144 1 1 NIL HORIZONTAL MONITOR 33 265 104 310 NIL red-crates 17 1 11 SWITCH 33 326 196 359 show-red-peppers? show-red-peppers? 0 1 -1000 SLIDER 34 123 207 156 number-of-countdown number-of-countdown 10 100 34 1 1 NIL HORIZONTAL SLIDER 34 159 206 192 number-of-rot-time number-of-rot-time 1 100 80 1 1 NIL HORIZONTAL @#$#@#$#@ WHAT IS IT? ----------- This model is built to show a greenhouse owner the amount of employees it needs to get the best result in harvesting peppers. More harvesters means more peppers are harvested, but also mean more costs. The goal of this model is to find the optimal amount of employees. Economics are not included in the model, but can be insterted when handling the results of a behaviour space. HOW IT WORKS ------------ Harvesters start walking through the greenhouse in straigth paths. Every step they take they check wether the patch they are on is green, red or white. If the patch is green, nothing will happen and the harvester will walk further. If the patch is red, the harvester will harvest the pepper and take it with him. The patch will now turn green again. If the patch is white, also nothing will happen and the harvester will walk further. Green means: on this patch is no pepper ready to be harvested. Red means: on this patch a pepper is ready to be harvested. White means: on this patch are no more peppers. HOW TO USE IT ------------- The SETUP button creates a greenhouse with not fullgrown plants in it and on the top line a number of employees is situated, determined by the number-of-harvesters button. The GO button makes the plants grow and produce red peppers. The employees start harvesting the red peppers and collect them till they have collected 10 red peppers. The employees turn the red fields green again. When 10 peppers are collected, the employee jumps back to a random place in the top line of the field and the counter turns zero. The RED-CRATES counter adds one to the total amount. The number-of-countdown slider determines the amount of peppers growing on a patch. If a pepper is harvested this patch-own goes down by 1. If this number becomes 0, the employee makes the patch white. If there are not enough employees to harvest the peppers, some of them will rot. This happens when the pepper is red for a certain amount of time. This time can be set with the number-of-rot-time button. THINGS TO NOTICE ---------------- Notice that when a small amount of employees is used, the number of crates at the end is far lower than when a lot of employees is used. How is this possible? THINGS TO TRY ------------- Try to vary the amount of harvesters and see the difference in the amount of peppers harvested. EXTENDING THE MODEL ------------------- In the procedures tab some things can be adjusted. For example the amount of peppers that turn red every tick is now stated randomly as 1-4%. Also the speed of the turtles can be adjusted. Some things to extend the model are for example a variable speed of the employees. If there are less peppers, the employees can move faster. Another thing is a variable amount of employees. NETLOGO FEATURES ---------------- A workaround was necessary where the employees needed to jump to the first line in the model. A new employee is now created on a random place at the top line and the old one dies when 10 peppers are harvested. RELATED MODELS -------------- The rabbits-grass-weeds model uses the same idea of agents running around and then changing the patches. @#$#@#$#@ default true 0 Polygon -7500403 true true 150 5 40 250 150 205 260 250 airplane true 0 Polygon -7500403 true true 150 0 135 15 120 60 120 105 15 165 15 195 120 180 135 240 105 270 120 285 150 270 180 285 210 270 165 240 180 180 285 195 285 165 180 105 180 60 165 15 arrow true 0 Polygon -7500403 true true 150 0 0 150 105 150 105 293 195 293 195 150 300 150 box false 0 Polygon -7500403 true true 150 285 285 225 285 75 150 135 Polygon -7500403 true true 150 135 15 75 150 15 285 75 Polygon -7500403 true true 15 75 15 225 150 285 150 135 Line -16777216 false 150 285 150 135 Line -16777216 false 150 135 15 75 Line -16777216 false 150 135 285 75 bug true 0 Circle -7500403 true true 96 182 108 Circle -7500403 true true 110 127 80 Circle -7500403 true true 110 75 80 Line -7500403 true 150 100 80 30 Line -7500403 true 150 100 220 30 butterfly true 0 Polygon -7500403 true true 150 165 209 199 225 225 225 255 195 270 165 255 150 240 Polygon -7500403 true true 150 165 89 198 75 225 75 255 105 270 135 255 150 240 Polygon -7500403 true true 139 148 100 105 55 90 25 90 10 105 10 135 25 180 40 195 85 194 139 163 Polygon -7500403 true true 162 150 200 105 245 90 275 90 290 105 290 135 275 180 260 195 215 195 162 165 Polygon -16777216 true false 150 255 135 225 120 150 135 120 150 105 165 120 180 150 165 225 Circle -16777216 true false 135 90 30 Line -16777216 false 150 105 195 60 Line -16777216 false 150 105 105 60 car false 0 Polygon -7500403 true true 300 180 279 164 261 144 240 135 226 132 213 106 203 84 185 63 159 50 135 50 75 60 0 150 0 165 0 225 300 225 300 180 Circle -16777216 true false 180 180 90 Circle -16777216 true false 30 180 90 Polygon -16777216 true false 162 80 132 78 134 135 209 135 194 105 189 96 180 89 Circle -7500403 true true 47 195 58 Circle -7500403 true true 195 195 58 circle false 0 Circle -7500403 true true 0 0 300 circle 2 false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 cow false 0 Polygon -7500403 true true 200 193 197 249 179 249 177 196 166 187 140 189 93 191 78 179 72 211 49 209 48 181 37 149 25 120 25 89 45 72 103 84 179 75 198 76 252 64 272 81 293 103 285 121 255 121 242 118 224 167 Polygon -7500403 true true 73 210 86 251 62 249 48 208 Polygon -7500403 true true 25 114 16 195 9 204 23 213 25 200 39 123 cylinder false 0 Circle -7500403 true true 0 0 300 dot false 0 Circle -7500403 true true 90 90 120 face happy false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 255 90 239 62 213 47 191 67 179 90 203 109 218 150 225 192 218 210 203 227 181 251 194 236 217 212 240 face neutral false 0 Circle -7500403 true true 8 7 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Rectangle -16777216 true false 60 195 240 225 face sad false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 168 90 184 62 210 47 232 67 244 90 220 109 205 150 198 192 205 210 220 227 242 251 229 236 206 212 183 fish false 0 Polygon -1 true false 44 131 21 87 15 86 0 120 15 150 0 180 13 214 20 212 45 166 Polygon -1 true false 135 195 119 235 95 218 76 210 46 204 60 165 Polygon -1 true false 75 45 83 77 71 103 86 114 166 78 135 60 Polygon -7500403 true true 30 136 151 77 226 81 280 119 292 146 292 160 287 170 270 195 195 210 151 212 30 166 Circle -16777216 true false 215 106 30 flag false 0 Rectangle -7500403 true true 60 15 75 300 Polygon -7500403 true true 90 150 270 90 90 30 Line -7500403 true 75 135 90 135 Line -7500403 true 75 45 90 45 flower false 0 Polygon -10899396 true false 135 120 165 165 180 210 180 240 150 300 165 300 195 240 195 195 165 135 Circle -7500403 true true 85 132 38 Circle -7500403 true true 130 147 38 Circle -7500403 true true 192 85 38 Circle -7500403 true true 85 40 38 Circle -7500403 true true 177 40 38 Circle -7500403 true true 177 132 38 Circle -7500403 true true 70 85 38 Circle -7500403 true true 130 25 38 Circle -7500403 true true 96 51 108 Circle -16777216 true false 113 68 74 Polygon -10899396 true false 189 233 219 188 249 173 279 188 234 218 Polygon -10899396 true false 180 255 150 210 105 210 75 240 135 240 house false 0 Rectangle -7500403 true true 45 120 255 285 Rectangle -16777216 true false 120 210 180 285 Polygon -7500403 true true 15 120 150 15 285 120 Line -16777216 false 30 120 270 120 leaf false 0 Polygon -7500403 true true 150 210 135 195 120 210 60 210 30 195 60 180 60 165 15 135 30 120 15 105 40 104 45 90 60 90 90 105 105 120 120 120 105 60 120 60 135 30 150 15 165 30 180 60 195 60 180 120 195 120 210 105 240 90 255 90 263 104 285 105 270 120 285 135 240 165 240 180 270 195 240 210 180 210 165 195 Polygon -7500403 true true 135 195 135 240 120 255 105 255 105 285 135 285 165 240 165 195 line true 0 Line -7500403 true 150 0 150 300 line half true 0 Line -7500403 true 150 0 150 150 pentagon false 0 Polygon -7500403 true true 150 15 15 120 60 285 240 285 285 120 person false 0 Circle -7500403 true true 110 5 80 Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90 Rectangle -7500403 true true 127 79 172 94 Polygon -7500403 true true 195 90 240 150 225 180 165 105 Polygon -7500403 true true 105 90 60 150 75 180 135 105 person farmer false 0 Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90 Polygon -1 true false 60 195 90 210 114 154 120 195 180 195 187 157 210 210 240 195 195 90 165 90 150 105 150 150 135 90 105 90 Circle -7500403 true true 110 5 80 Rectangle -7500403 true true 127 79 172 94 Polygon -13345367 true false 120 90 120 180 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 180 90 172 89 165 135 135 135 127 90 Polygon -6459832 true false 116 4 113 21 71 33 71 40 109 48 117 34 144 27 180 26 188 36 224 23 222 14 178 16 167 0 Line -16777216 false 225 90 270 90 Line -16777216 false 225 15 225 90 Line -16777216 false 270 15 270 90 Line -16777216 false 247 15 247 90 Rectangle -6459832 true false 240 90 255 300 plant false 0 Rectangle -7500403 true true 135 90 165 300 Polygon -7500403 true true 135 255 90 210 45 195 75 255 135 285 Polygon -7500403 true true 165 255 210 210 255 195 225 255 165 285 Polygon -7500403 true true 135 180 90 135 45 120 75 180 135 210 Polygon -7500403 true true 165 180 165 210 225 180 255 120 210 135 Polygon -7500403 true true 135 105 90 60 45 45 75 105 135 135 Polygon -7500403 true true 165 105 165 135 225 105 255 45 210 60 Polygon -7500403 true true 135 90 120 45 150 15 180 45 165 90 square false 0 Rectangle -7500403 true true 30 30 270 270 square 2 false 0 Rectangle -7500403 true true 30 30 270 270 Rectangle -16777216 true false 60 60 240 240 star false 0 Polygon -7500403 true true 151 1 185 108 298 108 207 175 242 282 151 216 59 282 94 175 3 108 116 108 target false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 Circle -7500403 true true 60 60 180 Circle -16777216 true false 90 90 120 Circle -7500403 true true 120 120 60 tree false 0 Circle -7500403 true true 118 3 94 Rectangle -6459832 true false 120 195 180 300 Circle -7500403 true true 65 21 108 Circle -7500403 true true 116 41 127 Circle -7500403 true true 45 90 120 Circle -7500403 true true 104 74 152 triangle false 0 Polygon -7500403 true true 150 30 15 255 285 255 triangle 2 false 0 Polygon -7500403 true true 150 30 15 255 285 255 Polygon -16777216 true false 151 99 225 223 75 224 truck false 0 Rectangle -7500403 true true 4 45 195 187 Polygon -7500403 true true 296 193 296 150 259 134 244 104 208 104 207 194 Rectangle -1 true false 195 60 195 105 Polygon -16777216 true false 238 112 252 141 219 141 218 112 Circle -16777216 true false 234 174 42 Rectangle -7500403 true true 181 185 214 194 Circle -16777216 true false 144 174 42 Circle -16777216 true false 24 174 42 Circle -7500403 false true 24 174 42 Circle -7500403 false true 144 174 42 Circle -7500403 false true 234 174 42 turtle true 0 Polygon -10899396 true false 215 204 240 233 246 254 228 266 215 252 193 210 Polygon -10899396 true false 195 90 225 75 245 75 260 89 269 108 261 124 240 105 225 105 210 105 Polygon -10899396 true false 105 90 75 75 55 75 40 89 31 108 39 124 60 105 75 105 90 105 Polygon -10899396 true false 132 85 134 64 107 51 108 17 150 2 192 18 192 52 169 65 172 87 Polygon -10899396 true false 85 204 60 233 54 254 72 266 85 252 107 210 Polygon -7500403 true true 119 75 179 75 209 101 224 135 220 225 175 261 128 261 81 224 74 135 88 99 wheel false 0 Circle -7500403 true true 3 3 294 Circle -16777216 true false 30 30 240 Line -7500403 true 150 285 150 15 Line -7500403 true 15 150 285 150 Circle -7500403 true true 120 120 60 Line -7500403 true 216 40 79 269 Line -7500403 true 40 84 269 221 Line -7500403 true 40 216 269 79 Line -7500403 true 84 40 221 269 x false 0 Polygon -7500403 true true 270 75 225 30 30 225 75 270 Polygon -7500403 true true 30 75 75 30 270 225 225 270 @#$#@#$#@ NetLogo 4.0.4 @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ setup file-open "peppers5.txt" go file-show sum [red-peppers] of turtles file-close all? patches [pcolor = white] red-crates @#$#@#$#@ @#$#@#$#@ default 0.0 -0.2 0 0.0 1.0 0.0 1 1.0 0.0 0.2 0 0.0 1.0 link direction true 0 Line -7500403 true 150 150 90 180 Line -7500403 true 150 150 210 180 @#$#@#$#@