Learning exercise adapted from Donella Meadows "Thinking in Systems," Part One: Systems Structure and Behavior. The example is a single stock system (room temperature) managed by two competing goal-seeking balancing loops, each of which is attempting to pull the stock to a different goal.
A Stock with Two Competing Balancing Loops, a thermostat
Ahmetcem Bingöl
Mehmet Nafiz Çıkıntoğlu
Tuna Erbaş
Thermostat
A model of thermostat action including conversions between heat and temperature and outside temperature. See also, after this model, how the concept map of a thermostat at IM-735 changed to the concept map at IM-736
Thermostat
From Evans RG and Stoddardt GL 1990 paper Soc Sci Med 31(12)1347-63 , also published in a book by Evans, Barer and Marmor, Why are some people healthy and others not?: The determinants of population health. This is a steady state model of IM-424 that ignores deaths and population increase. This is extended in IM-451
Producing Health Consuming Health Care 2 Steady State
The simplest negative feedback dynamic: a constant upper limit. Used to explore Insightmaker options.
Note: temperature units don't work. The simulation uses dollars to show how the relationships between units. Removing units (making every variable unitless) is also an option.
The above note is now untrue. I changed the unites of "heating rate" to "degree/minutes" and do not now get a units error. (Paul Newton)
Clone of Simple Thermostat Example
A causal loop diagram of thermostat action including conversions between heat and temperature and outside temperature. (Insight 394) extended to include fiddling with the thermostat controls based on differential house and outside temperatures. The simulation model is at Insightmaker 393.
Thermostat causal loop diagram extended
This is the Concept map at IM-735 modified to reflect the learning after system dynamics modeling at IM-393,
Thermostat Concept Map 2
This is a stock flow map representation From Evans RG and Stoddardt GL 1990 paper Soc Sci Med 31(12)1347-63 , also published in a book by Evans, Barer and Marmor, Why are some people healthy and others not?: The determinants of population health See IM-425 for a simulation.
Producing Health Consuming Health Care
The simplest negative feedback dynamic: a constant upper limit. Used to explore Insightmaker options.
Note: temperature units don't work. The simulation uses dollars to show how the relationships between units. Removing units (making every variable unitless) is also an option.
Simple Thermostat Example
Learning exercise adapted from Donella Meadows "Thinking in Systems," Part One: Systems Structure and Behavior. The example is a single stock system (room temperature) managed by two competing goal-seeking balancing loops, each of which is attempting to pull the stock to a different goal.
Clone of Room Temperature Control
Full mind map version following modelling and simulation
Producing Health Consuming Health Care Mind Map
The simplest negative feedback dynamic: a constant upper limit. Used to explore Insightmaker options.
Note: temperature units don't work. The simulation uses dollars to show how the relationships between units. Removing units (making every variable unitless) is also an option.
Clone of Simple Thermostat Example
A thermostat analogy used by Evans and Stoddardt in Producing Health Consuming HealthCare to explain why healthcare spending increases. This concept map is based on the Insight IM-736 Thermostat example
Health Care Thermostat Concept Map
Mindmap (tree) version of thermostat concept map
Thermostat Mind Map
Concept map about how a thermostat works. Slightly adapted from http://cmap.ihmc.us/docs/linkingwords.html See how this changed after SD modelling at IM-736
Thermostat Concept Map
BERNA GİZEM AYSUN 2 THERMOSTAT
A model of thermostat action including conversions between heat and temperature and outside temperature. See also, after this model, how the concept map of a thermostat at IM-735 changed to the concept map at IM-736
Clone of Thermostat
From Evans RG and Stoddardt GL 1990 paper Soc Sci Med 31(12)1347-63 , also published in a book by Evans, Barer and Marmor, Why are some people healthy and others not?: The determinants of population health. To IM-425 We add impacts of spending and a "Thermostat" setting for population health controlling health spending.
Clone of Producing Health Consuming Health Care 3 Spending and Target
A causal loop diagram of thermostat action including conversions between heat and temperature and outside temperature. The simulation model is at Insightmaker 393
Thermostat causal loop diagram
From Evans RG and Stoddardt GL 1990 paper Soc Sci Med 31(12)1347-63 , also published in a book by Evans, Barer and Marmor, Why are some people healthy and others not?: The determinants of population health. This is a steady state model of IM-424 that ignores deaths and population increase. This is extended in IM-451
Clone of Producing Health Consuming Health Care 2 Steady State
The simplest negative feedback dynamic: a constant upper limit. Used to explore Insightmaker options.
Note: temperature units don't work. The simulation uses dollars to show how the relationships between units. Removing units (making every variable unitless) is also an option.
Clone of Clone of Simple Thermostat Example
The simplest negative feedback dynamic: a constant upper limit. Used to explore Insightmaker options.
Note: temperature units don't work. The simulation uses dollars to show how the relationships between units. Removing units (making every variable unitless) is also an option.
Clone of Simple Thermostat Example
A rich picture representation of the interactions described in Producing Health Consuming HEalth Care and usually referred to as the EBM Model or Field Theory of Health
Producing Health Consuming Healthcare CLDs
Learning exercise adapted from Donella Meadows "Thinking in Systems," Part One: Systems Structure and Behavior. The example is a single stock system (room temperature) managed by two competing goal-seeking balancing loops, each of which is attempting to pull the stock to a different goal.
Clone of A Stock with Two Competing Balancing Loops, a thermostat
