This is highly experimental, and currently works only for simple System Dynamics models (no arrays, functions, sketch graphs, tabulated lookups, etc!).

To run the model, simply click the Run button in the Run Control dialog window. You can them move sliders for the stocks and parameters, and observe the effect on model behaviour.

Equations

{UTF-8} Maximum desired HEW performance= 1 ~ Per ~ | Net change in residents desired performance= (Maximum desired HEW performance*Compliance of the industry with the residents HEW Performance\ -Residents Desired HEW Performance)/Residents Adjustment Time ~ Per/Year ~ | Indicative change in communal spaces= (Communal spaces funding gap/Unit cost of maintaining communal spaces)/Time to adjust communal spaces ~ acre/Year ~ | Maximum Communal Spaces= 300000 ~ acre ~ | Net change in communal spaces= min(Indicative change in communal spaces, Maximum change in communal spaces) ~ acre/Year ~ | Maximum change in communal spaces= MAX(Maximum Communal Spaces-Communal Spaces, 0)/Time to adjust communal spaces ~ acre/Year ~ | Energy Efficiency Step Function= STEP(Investment in Energy Efficiency, 2016) ~ GBP ~ | Available funding for communal spaces= IF THEN ELSE(Communal Spaces Step Function>0, Communal Spaces Step Function, Reference investment in communal spaces*Use of communal spaces) ~ GBP/Year ~ SHOULD BE IF THEN ELSE, TO ENSURE THAT IF INVESTMENT>0, REFERENCE IS NOT \ TAKEN INTO ACCOUNT | Monitoring Step Function= STEP(Investment in Monitoring, 2016) ~ GBP ~ | Effect of EE Investment= Energy Efficiency Step Function/Reference Investment in Energy Efficiency ~ Dmnl ~ | Monitoring effect= Monitoring Step Function/Reference Investment in Monitoring+1 ~ Dmnl ~ | Communal Spaces Step Function= STEP(Investment in Communal Spaces, 2016) ~ GBP/Year ~ | HEW performance change by compromise= (MAX(Industry Intended HEW Performance,EE Related HEW Performance)-Average HEW Performance of Buildings )/Time to compromise ~ Per/Year ~ | Increase in Capabilities= Fractional Capability Increase per Rework*(Increase in HEW Performance by rework+Increase in EE performance by rework\ )* MAX(Maximum Capabilities-Capabilities of the Industry , 0) ~ Capability/Year ~ | EE performance change by compromise= (Industry Intended EE Performance-Average Energy Efficiency Performance)/Time to compromise ~ Per/Year ~ | EE Related HEW Performance= WITH LOOKUP ( Average Energy Efficiency Performance, ([(0.4,0)-(1,1)],(0.4,0.4),(0.5,0.43),(0.6,0.48),(0.7,0.58),(0.8,0.65),(0.9,0.68),(\ 1,0.7) )) ~ Per ~ ([(0.5,0)-(1,1)],(0.5,0.4),(0.6,0.45),(0.7,0.5),(0.8,0.55),(0.9,0.59),(1,0.\ 6) ) | Industry Intended EE Performance= Desired Energy Efficiency Performance*Effect of Capabilities on Performance*(1+Effect of EE Investment\ ) ~ Per ~ | Gap between the desired and actual EE performance= MAX(Desired Energy Efficiency Performance-Average Energy Efficiency Performance, 0) ~ Per ~ | Gap between the desired and actual HEW performance= Residents Desired HEW Performance-Average HEW Performance of Buildings ~ Per ~ | Increase in EE performance by rework= Gap between the desired and actual EE performance*Rework Fraction*Monitoring effect ~ Per/Year ~ | Average Energy Efficiency Performance= INTEG ( EE performance change by compromise+Increase in EE performance by rework, 0.494) ~ Per ~ | Use of communal spaces= Communal Spaces*Community Connection/Normal communal spaces ~ Dmnl ~ 153496 is the initial value of third spaces | Ratio of communal spaces to the normal= Communal Spaces/Normal communal spaces ~ Dmnl ~ | Effect of HEW performance on wellbeing= WITH LOOKUP ( Compliance of the industry with the residents HEW Performance, ([(0,0)-(1,1)],(0,0.047),(0.1,0.086),(0.2,0.15),(0.3,0.249),(0.4,0.383),(0.5,0.539)\ ,(0.6,0.687),(0.7,0.805),(0.8,0.886),(0.9,0.936),(1,0.965) )) ~ Dmnl ~ ([(0,0)-(1,1)],(0,0.047),(0.1,0.086),(0.2,0.15),(0.3,0.249),(0.4,0.383),(0.\ 5,0.539),(0.6,0.687),(0.7,0.805),(0.8,0.886),(0.9,0.936),(1,0.965) ) | Effect of communal spaces on wellbeing= WITH LOOKUP ( Ratio of communal spaces to the normal, ([(0.6,0)-(1.4,1)],(0.6,0.5),(0.7,0.52),(0.8,0.57),(0.9,0.62),(1,0.7),(1.1,0.82),(1.2\ ,0.9),(1.3,0.97),(1.4,1) )) ~ Dmnl ~ ([(0.5,0)-(1,1)],(0.5,0.5),(0.6,0.65),(0.7,0.78),(0.8,0.88),(0.9,0.95),(1,1\ ) ) | Capabilities of the Industry= INTEG ( Increase in Capabilities, 0.74) ~ Capability ~ Initial Value is set to make no effect initially, i.e \ Capability*Desired=Initial EE | Normal communal spaces= 150000 ~ acre ~ | Fractional Capability Increase per Rework= 0.5 ~ 1/Per ~ .4 | Reference Investment in Monitoring= 1000 ~ GBP ~ | Increase in HEW Performance by rework= Gap between the desired and actual HEW performance*Rework Fraction*Monitoring effect ~ Per/Year ~ | Annual cost of maintaining communal spaces= Communal Spaces*Unit cost of maintaining communal spaces ~ GBP/Year ~ | Average HEW Performance of Buildings= INTEG ( Increase in HEW Performance by rework+HEW performance change by compromise, 0.494) ~ Per ~ 0.6 | Community Connection= INTEG ( Net change in community connection, 0.8) ~ Dmnl ~ | Community connection adjustment time= 8 ~ Year ~ | Compliance of the industry with the residents HEW Performance= Average HEW Performance of Buildings/Residents Desired HEW Performance ~ Dmnl ~ | Desired Energy Efficiency Performance= 0.9 ~ Per ~ | Effect of community connection on wellbeing= Community Connection ~ Dmnl ~ ([(0.6,0)-(1,1)],(0.6,0.6),(0.7,0.65),(0.8,0.85),(0.9,0.96),(1,1) ) | Reference investment in communal spaces= 6000 ~ GBP/Year ~ 3300 | Effect of HEW performance on community connection= WITH LOOKUP ( Compliance of the industry with the residents HEW Performance, ([(0.4,0)-(1,1)],(0.4,0.6),(0.5,0.62),(0.6,0.68),(0.7,0.75),(0.8,0.82),(0.9,0.88),(\ 1,0.9) )) ~ Dmnl ~ | Effect of communal spaces on community connection= WITH LOOKUP ( Use of communal spaces, ([(0.3,0)-(1.25,1)],(0.3,0.3),(0.4,0.32),(0.5,0.35),(0.6,0.45),(0.7,0.65),(0.8,0.8)\ ,(0.9,0.9),(1,0.95),(1.1,0.98),(1.2,1) )) ~ Dmnl ~ | Indicated community connection= (Effect of HEW performance on community connection+Effect of communal spaces on community connection\ )/2 ~ Dmnl ~ | Indicated Wellbeing= Effect of community connection on wellbeing*Weight of community connection + Effect of HEW performance on wellbeing*Weight of HEW performance + Effect of communal spaces on wellbeing*Weight of communal spaces ~ Dmnl ~ | Industry Intended HEW Performance= Effect of Capabilities on Performance*Residents Desired HEW Performance ~ Per ~ | Investment in Energy Efficiency= 0 ~ GBP ~ CURRENTLY, POLICY SCRAPPING IS OMITTED, SO INVESTMENT IS NOT REALLY \ RELATED TO ENERGY EFFICIENCY. 20000-30000 IS THE APPROXIMATE RETROFITTING \ COST PER HOUSE. | Investment in Communal Spaces= 0 ~ GBP/Year ~ 15000000 GBP IS THE APPROXIMATE AMOUNT TO MAINTAIN THE CURRENT THIRD \ SPACES, WITH 100 GBP/ACRE | Communal spaces funding gap= Available funding for communal spaces-Annual cost of maintaining communal spaces ~ GBP/Year ~ | Net change in community connection= (Indicated community connection-Community Connection)/Community connection adjustment time ~ Dmnl/Year ~ | Net change in wellbeing= (Indicated Wellbeing-Wellbeing of Residents)/Wellbeing adjustment time ~ Dmnl/Year ~ | Weight of HEW performance= 0.32 ~ Dmnl ~ | Weight of communal spaces= 0.32 ~ Dmnl ~ | Wellbeing of Residents= INTEG ( Net change in wellbeing, 0.72) ~ Dmnl ~ 0.85 | Wellbeing adjustment time= 1 ~ Year ~ | Residents Desired HEW Performance= INTEG ( Net change in residents desired performance, 0.8) ~ Per ~ | Rework Fraction= 0.02 ~ 1/Year ~ 0.02 | Weight of community connection= 0.36 ~ Dmnl ~ | Communal Spaces= INTEG ( Net change in communal spaces, 150000) ~ acre ~ | Time to adjust communal spaces= 15 ~ Year ~ | Unit cost of maintaining communal spaces= 0.04 ~ (GBP/acre)/Year ~ | Investment in Monitoring= 0 ~ GBP ~ MONITORING COSTS 5000 GBP PER HOUSE, AS NEIL SAID. | Effect of Capabilities on Performance= Capabilities of the Industry/Maximum Capabilities ~ Dmnl ~ | Residents Adjustment Time= 25 ~ Year ~ | Maximum Capabilities= 1 ~ Capability ~ | Time to compromise= 10 ~ Year ~ | Reference Investment in Energy Efficiency= 30000 ~ GBP ~ | ******************************************************** .Control ********************************************************~ Simulation Control Parameters | FINAL TIME = 2050 ~ Year ~ The final time for the simulation. | INITIAL TIME = 2005 ~ Year ~ The initial time for the simulation. | SAVEPER = TIME STEP ~ Year [0,?] ~ The frequency with which output is stored. | TIME STEP = 0.0625 ~ Year [0,?] ~ The time step for the simulation. | \\\---/// Sketch information - do not modify anything except names V300 Do not put anything below this section - it will be ignored *View 1 $192-192-192,0,Calibri|12||0-0-0|0-0-0|0-0-0|-1--1--1|-1--1--1|96,96,75,0 10,1,Investment in Energy Efficiency,1787,316,78,26,8,131,0,24,0,0,0,0,-1--1--1,0-0-0,|16|B|0-0-0 10,2,Reference Investment in Energy Efficiency,1843,483,68,23,8,131,1,2,0,0,0,0,-1--1--1,0-0-0,|12||255-160-0 1,3,2,4,1,1,0,0,0,128,0,-1--1--1,,1|(1794,492)| 10,4,Effect of EE Investment,1712,435,69,19,8,3,0,0,0,0,0,0 10,5,Average Energy Efficiency Performance,1691,223,58,33,3,131,0,0,0,0,0,0 12,6,48,1670,34,10,8,0,3,0,0,-1,0,0,0 1,7,9,5,4,0,0,22,0,0,0,-1--1--1,,1|(1670,137)| 1,8,9,6,100,0,0,22,0,0,0,-1--1--1,,1|(1670,57)| 11,9,48,1670,79,8,6,33,3,0,0,2,0,0,0 10,10,Increase in EE performance by rework,1597,79,65,25,40,131,0,0,-1,0,0,0 12,11,48,1471,237,10,8,0,3,0,0,-1,0,0,0 1,12,14,5,4,0,0,22,0,0,0,-1--1--1,,1|(1599,237)| 1,13,14,11,68,0,0,22,2,0,0,-1--1--1,|12||0-0-0,1|(1517,237)| 11,14,48,1560,237,6,8,34,3,0,0,1,0,0,0 10,15,EE performance change by compromise,1560,268,76,23,40,131,0,0,-1,0,0,0 10,16,Desired Energy Efficiency Performance,1381,312,63,23,8,131,0,2,0,0,0,0,-1--1--1,0-0-0,|12||255-160-0 10,17,Residents Adjustment Time,1215,516,48,15,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 10,18,Capabilities of the Industry,1219,355,58,33,3,131,0,0,0,0,0,0 12,19,48,1024,354,10,8,0,3,0,0,-1,0,0,0 1,20,22,18,4,0,0,22,0,0,0,-1--1--1,,1|(1129,354)| 1,21,22,19,100,0,0,22,0,0,0,-1--1--1,,1|(1059,354)| 11,22,48,1091,354,6,8,34,3,0,0,1,0,0,0 10,23,Increase in Capabilities,1091,381,41,19,40,3,0,0,-1,0,0,0 10,24,Effect of Capabilities on Performance,1426,443,72,19,8,3,0,0,0,0,0,0 1,25,18,24,1,0,0,0,0,128,0,-1--1--1,,1|(1299,436)| 10,26,Industry Intended EE Performance,1586,371,56,26,8,131,0,0,0,0,0,0 1,27,16,26,1,0,0,0,0,128,0,-1--1--1,,1|(1496,317)| 10,28,Time to compromise,1656,307,44,13,8,131,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 1,29,28,15,1,1,0,0,0,128,0,-1--1--1,,1|(1599,301)| 1,30,5,15,1,0,0,0,0,128,0,-1--1--1,,1|(1637,274)| 10,31,Fractional Capability Increase per Rework,1235,299,62,15,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 1,32,31,23,1,1,0,0,0,128,0,-1--1--1,,1|(1094,372)| 10,33,Maximum Capabilities,1234,463,41,19,8,3,1,0,0,0,0,0 1,34,33,24,0,1,0,0,0,128,0,-1--1--1,,1|(1307,455)| 10,35,Rework Fraction,1558,121,47,9,8,131,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 1,36,35,10,1,1,0,0,0,128,0,-1--1--1,,1|(1570,103)| 10,37,Gap between the desired and actual EE performance,1381,160,54,32,8,131,0,0,0,0,0,0 1,38,16,37,1,0,0,0,0,128,0,-1--1--1,,1|(1371,194)| 10,39,Investment in Monitoring,2256,389,64,26,8,3,0,24,0,0,0,0,-1--1--1,0-0-0,|16|B|0-0-0 10,40,Wellbeing of Residents,513,269,58,33,3,131,0,0,0,0,0,0 10,41,Community Connection,652,658,48,34,3,131,0,0,0,0,0,0 10,42,Communal Spaces,326,657,48,34,3,131,0,0,0,0,0,0 12,43,48,163,660,10,8,0,3,0,0,-1,0,0,0 1,44,46,42,4,0,0,22,0,0,0,-1--1--1,,1|(255,660)| 1,45,46,43,68,0,0,22,2,0,0,-1--1--1,|12||0-0-0,1|(197,660)| 11,46,48,227,660,6,8,34,3,0,0,1,0,0,0 10,47,Net change in communal spaces,227,691,48,23,40,131,0,0,-1,0,0,0 12,48,48,864,666,10,8,0,3,0,0,-1,0,0,0 1,49,51,41,4,0,0,22,0,0,0,-1--1--1,,1|(734,662)| 1,50,51,48,68,0,0,22,2,0,0,-1--1--1,|12||0-0-0,1|(817,662)| 11,51,48,775,662,6,8,34,3,0,0,1,0,0,0 10,52,Net change in community connection,775,693,57,23,40,131,0,0,-1,0,0,0 12,53,48,756,272,10,8,0,3,0,0,-1,0,0,0 1,54,56,40,4,0,0,22,0,0,0,-1--1--1,,1|(614,272)| 1,55,56,53,68,0,0,22,2,0,0,-1--1--1,|12||0-0-0,1|(708,272)| 11,56,48,664,272,6,8,34,3,0,0,1,0,0,0 10,57,Net change in wellbeing,664,299,48,19,40,3,0,0,-1,0,0,0 10,58,Use of communal spaces,474,705,41,26,8,131,0,0,0,0,0,0 1,59,42,58,1,0,0,0,0,128,0,-1--1--1,,1|(419,654)| 1,60,58,61,1,0,0,0,0,128,0,-1--1--1,,1|(470,749)| 10,61,Available funding for communal spaces,427,809,57,31,8,131,0,0,0,0,0,0 10,62,Communal spaces funding gap,315,880,43,25,8,131,0,0,0,0,0,0 10,63,Annual cost of maintaining communal spaces,329,757,52,28,8,131,0,0,0,0,0,0 10,64,Unit cost of maintaining communal spaces,228,765,52,22,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 10,65,Time to adjust communal spaces,97,702,42,20,8,131,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 1,66,42,63,1,0,0,0,0,128,0,-1--1--1,,1|(326,695)| 1,67,64,63,1,1,0,0,0,128,0,-1--1--1,,1|(295,796)| 1,68,63,62,1,0,0,0,0,128,0,-1--1--1,,1|(352,814)| 1,69,61,62,1,0,0,0,0,128,0,-1--1--1,,1|(395,850)| 1,70,65,175,1,1,0,0,0,128,0,-1--1--1,,1|(95,721)| 10,71,Investment in Communal Spaces,735,852,65,30,8,131,0,24,0,0,0,0,-1--1--1,0-0-0,|16|B|0-0-0 10,72,Indicated community connection,722,574,71,19,8,3,0,0,0,0,0,0 1,73,72,51,1,0,0,0,0,128,0,-1--1--1,,1|(766,627)| 1,74,58,76,1,0,0,0,0,128,0,-1--1--1,,1|(492,631)| 10,75,Compliance of the industry with the residents HEW Performance,1167,690,61,35,8,131,0,0,0,0,0,0 10,76,Effect of communal spaces on community connection,525,606,61,22,8,3,0,10,0,0,0,0,-1--1--1,0-0-0,|10||128-192-0 1,77,76,72,1,0,0,0,0,128,0,-1--1--1,,1|(573,563)| 10,78,Effect of HEW performance on community connection,900,550,66,22,8,3,0,10,0,0,0,0,-1--1--1,0-0-0,|10||128-192-0 1,79,78,72,1,0,0,0,0,128,0,-1--1--1,,1|(783,556)| 1,80,75,78,1,0,0,0,0,128,0,-1--1--1,,1|(1030,576)| 1,81,41,52,1,0,0,0,0,128,0,-1--1--1,,1|(696,691)| 10,82,Community connection adjustment time,861,768,47,22,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 1,83,82,52,1,1,0,0,0,128,0,-1--1--1,,1|(804,711)| 10,84,Indicated Wellbeing,468,364,35,19,8,3,0,0,0,0,0,0 10,85,Effect of communal spaces on wellbeing,322,425,59,15,8,3,0,10,0,0,0,0,-1--1--1,0-0-0,|10||128-192-0 10,86,Effect of community connection on wellbeing,624,444,57,22,8,3,0,10,0,0,0,0,-1--1--1,0-0-0,|10||128-192-0 10,87,Effect of HEW performance on wellbeing,885,383,46,22,8,3,0,10,0,0,0,0,-1--1--1,0-0-0,|10||128-192-0 1,88,42,150,1,0,0,0,0,128,0,-1--1--1,,1|(258,608)| 1,89,85,84,1,0,0,0,0,128,0,-1--1--1,,1|(387,380)| 1,90,87,84,1,0,0,0,0,128,0,-1--1--1,,1|(695,352)| 1,91,86,84,1,0,0,0,0,128,0,-1--1--1,,1|(554,391)| 1,92,41,86,1,0,0,0,0,128,0,-1--1--1,,1|(645,544)| 1,93,84,57,1,0,0,0,0,128,0,-1--1--1,,1|(532,321)| 1,94,40,57,1,0,0,0,0,128,0,-1--1--1,,1|(568,242)| 10,95,Wellbeing adjustment time,712,217,47,15,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 1,96,95,57,1,1,0,0,0,128,0,-1--1--1,,1|(713,237)| 10,97,Weight of community connection,208,268,33,22,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 10,98,Weight of communal spaces,207,317,44,15,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 10,99,Weight of HEW performance,211,366,44,15,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-160-0 1,100,97,84,0,1,0,0,0,128,0,-1--1--1,,1|(330,313)| 1,101,98,84,0,1,0,0,0,128,0,-1--1--1,,1|(335,339)| 1,102,99,84,0,1,0,0,0,128,0,-1--1--1,,1|(337,365)| 10,103,Average HEW Performance of Buildings,1710,616,58,33,3,131,0,0,0,0,0,0 12,104,48,1719,799,10,8,0,3,0,0,-1,0,0,0 1,105,107,103,4,0,0,22,0,0,0,-1--1--1,,1|(1716,690)| 1,106,107,104,100,0,0,22,0,0,0,-1--1--1,,1|(1716,767)| 11,107,48,1716,737,8,6,33,131,0,0,4,0,0,0 10,108,Increase in HEW Performance by rework,1795,737,71,27,40,131,0,0,-1,0,0,0 10,109,EE Related HEW Performance,1981,427,56,19,8,3,0,0,0,0,0,0 10,110,Industry Intended HEW Performance,1585,528,62,19,8,3,0,0,0,0,0,0 1,111,24,110,1,0,0,0,0,128,0,-1--1--1,,1|(1554,494)| 10,112,Residents Desired HEW Performance,1338,589,58,33,3,131,0,0,0,0,0,0 1,113,112,110,1,0,0,0,0,128,0,-1--1--1,,1|(1482,523)| 12,114,48,1978,618,10,8,0,3,0,0,-1,0,0,0 1,115,117,103,4,0,0,22,0,0,0,-1--1--1,,1|(1816,618)| 1,116,117,114,68,0,0,22,2,0,0,-1--1--1,|12||0-0-0,1|(1922,618)| 11,117,48,1870,618,6,8,34,3,0,0,1,0,0,0 10,118,HEW performance change by compromise,1870,647,63,21,40,131,0,0,-1,0,0,0 1,119,109,117,1,0,0,0,0,128,0,-1--1--1,,1|(1959,537)| 10,120,Time to compromise,1934,541,46,19,8,2,1,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128 1,121,120,117,1,1,0,0,0,128,0,-1--1--1,,1|(1919,577)| 10,122,Gap between the desired and actual HEW performance,1506,619,80,24,8,131,0,0,0,0,0,0 1,123,103,122,1,0,0,0,0,128,0,-1--1--1,,1|(1540,609)| 1,124,122,107,1,0,0,0,0,128,0,-1--1--1,,1|(1573,674)| 10,125,Rework Fraction,1631,751,32,19,8,2,1,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128 1,126,125,107,1,1,0,0,0,128,0,-1--1--1,,1|(1668,763)| 1,127,103,75,1,0,0,0,0,128,0,-1--1--1,,1|(1303,709)| 1,128,112,75,1,0,0,0,0,128,0,-1--1--1,,1|(1229,667)| 1,129,103,117,1,0,0,0,0,128,0,-1--1--1,,1|(1787,583)| 1,131,17,136,1,1,0,0,0,128,0,-1--1--1,,1|(1206,532)| 12,132,48,1130,582,10,8,0,3,1,0,-1,0,0,0 1,133,135,112,4,1,0,22,0,0,0,-1--1--1,,1|(1251,587)| 1,134,135,132,68,1,0,22,2,0,0,-1--1--1,|12||0-0-0,1|(1175,587)| 11,135,48,1216,587,6,8,34,3,1,0,1,0,0,0 10,136,Net change in residents desired performance,1216,619,76,24,40,131,1,0,-1,0,0,0 1,137,112,136,1,1,0,0,0,128,0,-1--1--1,,1|(1302,583)| 1,138,4,26,1,0,0,0,0,128,0,-1--1--1,,1|(1632,434)| 10,139,Reference investment in communal spaces,541,866,75,19,8,3,1,2,0,0,0,0,-1--1--1,0-0-0,|12||255-160-0 1,140,139,61,1,1,0,0,0,128,0,-1--1--1,,1|(485,796)| 10,141,Monitoring effect,2095,390,59,11,8,3,0,0,0,0,0,0 1,142,141,108,1,0,0,0,0,128,0,-1--1--1,,1|(1975,658)| 10,143,Reference Investment in Monitoring,2210,466,47,28,8,3,1,2,0,0,0,0,-1--1--1,0-0-0,|12||255-160-0 1,144,143,141,0,1,0,0,0,128,0,-1--1--1,,1|(2145,423)| 1,145,41,58,1,0,0,0,0,128,0,-1--1--1,,1|(590,690)| 10,146,Normal communal spaces,449,584,44,23,8,131,1,2,0,0,0,0,-1--1--1,0-0-0,|12||255-160-0 1,147,146,58,1,1,0,0,0,128,0,-1--1--1,,1|(465,631)| 1,148,18,23,1,0,0,0,0,128,0,-1--1--1,,1|(1169,406)| 1,149,33,23,1,1,0,0,0,64,0,-1--1--1,,1|(1161,463)| 10,150,Ratio of communal spaces to the normal,297,536,71,19,8,3,0,0,0,0,0,0 1,151,150,85,1,0,0,0,0,128,0,-1--1--1,,1|(281,479)| 1,152,71,165,1,0,0,0,0,128,0,-1--1--1,,1|(680,766)| 1,153,75,87,1,0,0,0,0,128,0,-1--1--1,,1|(1068,486)| 1,154,146,150,1,1,0,0,0,64,0,-1--1--1,,1|(404,534)| 1,155,5,109,1,0,0,0,0,128,0,-1--1--1,,1|(1896,290)| 1,156,24,26,1,0,0,0,0,128,0,-1--1--1,,1|(1532,425)| 1,157,141,9,1,0,0,0,0,128,0,-1--1--1,,1|(2005,238)| 1,158,110,117,1,0,0,0,0,128,0,-1--1--1,,1|(1765,523)| 1,159,37,10,1,0,43,0,2,192,0,-1--1--1,|12||0-0-0,1|(1485,93)| 1,160,5,37,1,0,45,0,2,128,0,-1--1--1,|12||0-0-0,1|(1468,190)| 1,161,112,122,1,0,0,0,0,128,0,-1--1--1,,1|(1401,630)| 1,162,26,15,1,0,0,0,0,128,0,-1--1--1,,1|(1583,325)| 1,163,10,22,1,0,0,0,0,128,0,-1--1--1,,1|(1263,135)| 1,164,108,23,1,0,0,0,0,128,0,-1--1--1,,1|(1254,687)| 10,165,Communal Spaces Step Function,595,792,49,26,8,131,0,0,0,0,0,0 1,166,165,61,1,0,0,0,0,128,0,-1--1--1,,1|(524,767)| 10,167,Energy Efficiency Step Function,1822,396,59,19,8,3,0,0,0,0,0,0 1,168,1,167,1,0,0,0,0,128,0,-1--1--1,,1|(1816,350)| 1,169,167,4,1,0,0,0,0,128,0,-1--1--1,,1|(1777,439)| 10,170,Monitoring Step Function,2129,307,55,19,8,3,0,0,0,0,0,0 1,171,39,170,0,0,0,0,0,128,0,-1--1--1,,1|(2192,348)| 1,172,170,141,0,0,0,0,0,128,0,-1--1--1,,1|(2113,346)| 10,173,Maximum Communal Spaces,149,555,58,19,8,3,1,2,0,0,0,0,-1--1--1,0-0-0,|12||255-160-0 1,174,173,180,1,1,0,0,0,128,0,-1--1--1,,1|(122,599)| 10,175,Indicative change in communal spaces,160,840,64,26,8,131,0,0,0,0,0,0 1,176,62,175,1,0,0,0,0,64,0,-1--1--1,,1|(223,891)| 1,177,64,175,0,1,0,0,0,64,0,-1--1--1,,1|(200,795)| 1,178,175,47,1,0,0,0,0,128,0,-1--1--1,,1|(147,752)| 10,179,TIME STEP,227,737,44,11,8,2,1,3,-1,0,0,0,128-128-128,0-0-0,|12||128-128-128 10,180,Maximum change in communal spaces,129,622,54,26,8,131,0,0,0,0,0,0 1,181,42,180,0,0,0,0,0,128,0,-1--1--1,,1|(237,641)| 1,182,65,180,0,1,0,0,0,128,0,-1--1--1,,1|(109,671)| 1,183,180,47,0,0,0,0,0,128,0,-1--1--1,,1|(173,654)| 10,184,Maximum desired HEW performance,1285,741,53,15,8,3,1,10,0,0,0,0,-1--1--1,0-0-0,|10||255-128-0 1,185,184,136,0,1,0,0,0,128,0,-1--1--1,,1|(1256,690)| 1,186,75,136,0,0,0,0,0,128,0,-1--1--1,,1|(1191,654)| \\\---/// Sketch information - do not modify anything except names V300 Do not put anything below this section - it will be ignored *View 2 $192-192-192,0,Calibri|12||0-0-0|0-0-0|0-0-0|-1--1--1|-1--1--1|96,96,75,0 12,1,0,722,-36,340,57,3,131,0,0,-1,0,0,0 12,2,11929560,510,-24,80,20,3,124,0,0,0,0,0,0 Investment in Energy Efficiency,0,10000,1000 12,3,9504690,724,-27,80,20,3,124,0,0,0,0,0,0 Investment in Monitoring,0,10000,1000 12,4,10094190,938,-25,80,20,3,124,0,0,0,0,0,0 Investment in Communal Spaces,0,10000,1000 12,5,1836314,319,228,194,148,3,188,0,0,2,0,0,0 Average Energy Efficiency Performance,Graph 12,6,9242638,715,228,194,148,3,188,0,0,2,0,0,0 Average HEW Performance of Buildings,Graph 12,7,11602018,1111,228,194,148,3,188,0,0,2,0,0,0 Wellbeing of Residents,Graph 12,8,0,319,52,127,28,8,135,0,26,-1,0,0,0,-1--1--1,0-0-0,|16|B|0-128-0 Average Energy Efficiency 12,9,0,715,52,127,28,8,135,0,26,-1,0,0,0,-1--1--1,0-0-0,|16|B|0-128-0 Average HEW Performance 12,10,0,1111,52,127,28,8,135,0,26,-1,0,0,0,-1--1--1,0-0-0,|16|B|0-128-0 Wellbeing 12,11,0,724,-75,75,23,8,135,0,26,-1,0,0,0,-1--1--1,0-0-0,|14|B|64-64-128 Decision variables 12,12,13109246,1111,527,194,144,3,188,0,0,2,0,0,0 Community Connection,Graph 12,13,10881020,715,527,194,144,3,188,0,0,2,0,0,0 Communal Spaces,Graph ///---\\\ :GRAPH HEW_Performance_of_Build :TITLE HEW Performance of Buildings :SCALE :VAR Data Satisfaction :SCALE :VAR Average HEW Performance of Buildings :L<%^E!@ 1:Reference_Mon.vdf 1:Reference.vdf 9:Reference 11:Game_Small_v6.voc 12:Game_Small_v6.vpd 18:Game_Small_v4.vsc 20:Game_Small_v4.lst 15:0,0,0,0,0,0 19:75,0 27:2, 34:0, 4:Time 5:Net change in residents desired performance 35:Date 36:YYYY-MM-DD 37:2000 38:1 39:1 40:0 41:0 42:1 24:2005 25:2050 26:2050

<?xml version="1.0" encoding="utf-8" ?> <xmile version="1.0" level="3" xmlns="http://www.systemdynamics.org/XMILE" xmlns:isee="http://iseesystems.com/XMILE"> <header> <smile version="1.0"> <uses_arrays>1</uses_arrays> </smile> <name>Predator Prey Dynamics</name> <uuid>be75d15c-2d09-4cd8-84cb-fdc59b71fe05</uuid> <vendor>isee systems</vendor> <product version="10.0.2" lang="en">iThink</product> </header> <sim_specs time_units="Years"> <start>0</start> <stop>60</stop> <dt>0.125</dt> <method>RK4</method> </sim_specs> <dimensions> <dim name="Subscript_Set_1" size="1" /> </dimensions> <model_units /> <isee:prefs layer="interface" grid_width="14" grid_height="14" divide_by_zero_alert="true" show_module_prefix="true" hide_transparent_buttons="true"> <isee:window width="827" height="557" /> <isee:security /> <isee:print_setup width="586" height="767" orientation="portrait" /> </isee:prefs> <isee:equation_prefs order_by="sector" /> <model> <aux name="area"> <doc>The area of the ecosystem is defined as 1000 hectares.</doc> <eqn>1E3</eqn> <display x="209" y="248" color="black" /> </aux> <flow name="hare_births"> <doc>A compounding process is used to depict hare births. The births flow is defined as the product of Hares and their natality. This process works just like compounding interest in a savings account.</doc> <eqn>Hares*hare_birth__fraction</eqn> <non_negative /> <display x="226" y="150" color="#7F00FF"> <label_side>top</label_side> <pts> <pt x="135" y="150" /> <pt x="318" y="150" /> </pts> </display> </flow> <flow name="hare_deaths"> <doc>In this external resource process, lynx are the resource underwriting the consumption of hares. Each lynx has a productivity, given by hare kills per lynx.</doc> <eqn>Lynx*hares_killed__per_lynx</eqn> <non_negative /> <display x="482" y="149" color="#7F00FF"> <label_side>top</label_side> <pts> <pt x="362" y="149" /> <pt x="602" y="149" /> </pts> </display> </flow> <aux name="hare_\ndensity"> <doc>This equation calculates the average density of hares in the ecosystem.</doc> <eqn>Hares/area</eqn> <display x="310" y="242" color="#7F00FF"> <label_side>right</label_side> <label_angle>61</label_angle> </display> </aux> <aux name="hare_birth_\nfraction"> <doc>Each hare in the ecosystem is assumed to produce 1.25 offspring (on average) per year.</doc> <eqn>1.25</eqn> <display x="172" y="208" color="#7F00FF"> <label_side>left</label_side> <label_angle>168</label_angle> </display> </aux> <flow name="lynx\n_births"> <doc>A compounding process is used to depict lynx births. The births flow is defined as the product of lynx and their natality. This process works just like compounding interest in a savings account.</doc> <eqn>Lynx*lynx_birth__fraction</eqn> <non_negative /> <display x="525" y="341" color="red"> <label_side>right</label_side> <label_angle>62</label_angle> <pts> <pt x="607" y="341" /> <pt x="444" y="341" /> </pts> </display> </flow> <flow name="lynx_\ndeaths"> <doc>This is a draining process. Some fraction of the lynx population will die each year. The portion that dies, in turn, depends on the density of hares in the ecosystem.</doc> <eqn>Lynx*lynx_death__fraction</eqn> <non_negative /> <display x="341" y="342" color="red"> <label_side>top</label_side> <label_angle>128</label_angle> <pts> <pt x="400" y="342" /> <pt x="282" y="342" /> </pts> </display> </flow> <aux name="lynx_birth_\nfraction"> <doc>On average, each lynx will generate .25 offspring per year.</doc> <eqn>.25</eqn> <display x="580" y="378" color="red" /> </aux> <stock name="Hares"> <doc>Initially, there are 50000 hares in the ecosystem.</doc> <eqn>5E4</eqn> <inflow>hare_births</inflow> <outflow>hare_deaths</outflow> <display x="340" y="151" color="#7F00FF"> <label_side>center</label_side> </display> </stock>  <stock name="Lynx"> <doc>Initially, there are 1250 lynx.</doc> <eqn>1250</eqn> <inflow>lynx__births</inflow> <outflow>lynx__deaths</outflow> <outflow>one_time_lynx_harvest</outflow> <display x="422" y="338" color="red"> <label_side>center</label_side> </display> </stock> <aux name="hares_killed\n_per_lynx"> <doc>The number of hares killed per lynx (per year) increases with the density of hares in the ecosystem. Note that when density is 0 (there are no hares), kills per lynx per year must be 0.</doc> <eqn>hare__density</eqn> <gf discrete="false"> <xpts>0,50,100,150,200,250,300,350,400,450,500</xpts> <ypts>3.8899999999999998e-305,50,100,150,200,250,300,350,400,450,500</ypts> <xscale min="0" max="500" /> <yscale min="0" max="1000" /> </gf> <display x="412" y="251" color="red"> <label_angle>323</label_angle> </display> </aux> <aux name="lynx_death_\nfraction"> <doc>Lynx mortality -- the fraction of the lynx population that dies each year, is assumed to depend on hare density. With fewer hares, a greater fraction of the lynx population will starve.</doc> <eqn>hare__density</eqn> <gf discrete="false"> <xpts>0,10,20,30,40,50,60,70,80,90,100</xpts> <ypts>0.94000000000000006,0.66000000000000003,0.40000000000000002,0.34999999999999998,0.29999999999999999,0.25,0.20000000000000001,0.14999999999999999,0.10000000000000001,0.070000000000000007,0.050000000000000003</ypts> <xscale min="0" max="100" /> <yscale min="0" max="1" /> </gf> <display x="223" y="320" color="red"> <label_side>left</label_side> <label_angle>225</label_angle> </display> </aux> <flow name="one_time_lynx_harvest"> <doc>This test input uses a PULSE function to remove some number of Lynx from the system at time 4. This harvesting effectively knocks the system out of steady state, thus enabiling its latent dynamics to unfold.</doc> <eqn>0*size_of_1_time__lynx_harvest</eqn> <non_negative /> <display x="352" y="409" color="red"> <label_angle>348</label_angle> <pts> <pt x="420" y="355" /> <pt x="420" y="409" /> <pt x="284" y="409" /> </pts> </display> </flow> <aux name="size_of_1_time_\nlynx_harvest"> <eqn>0</eqn> <display x="220" y="427" color="red"> <label_side>left</label_side> <label_angle>188</label_angle> </display> </aux> <display show_pages="false" page_width="586" page_height="767" page_sequence="row" page_rows="2" page_cols="1" isee:show_values_on_hover="true" isee:converter_size="medium" zoom="100" report_flows="summed" scroll_x="0" scroll_y="0"> <connector x="318" y="162" uid="0" color="#7F00FF"> <from>Hares</from> <to>hare_births</to> </connector> <connector x="176" y="200" uid="1" color="#7F00FF"> <from>hare_birth__fraction</from> <to>hare_births</to> </connector> <connector x="441" 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Import a model from other modelling software

Equations