Coping but not coping in health and social care: masking the reality of running organisations beyond safe design capacity. From Eric Wolstenholme Syst. Dyn. Rev. 23, 371–389, (2007) abstract See IM-1008 for a stock flow version. Click the Start Story feature at the bottom left.

Exploring the conditions of permanent coexistence, rather than gradual disappearance of disadvantaged competitors. ​Z506 p32-35 System Zoo 3 by Hartmut Bossel.

Sources of Policy Resistance. From article Sterman, John D.  Learning from Evidence in a Complex World Am J Public Health 2006 96: 505-514. See also fighting complexity IM-1955

Flows between acute hospital and aged care for older people. See IM-1012 for a simpler version

A stock flow structure used to show the unit of analysis, scope of study and context of the ED Four hour rule project, cloned from im-399 monthly flows

An adaptation of the URBAN1 Model from Navid Ghaffarzadegan, John Lyneis and George P Richardson's How small system dynamics models can help the public policy process. System Dynamics Review 27: 22-44 (2011) Conference version at http://bit.ly/HlxtZj  and LA Alfeld and AK Graham's Introduction to Urban Dynamics 1974 p 195.

Upgrade of Kermack–McKendrick Epidemic SIR Infectious Disease Model (circa 2015) - Metrics by Guy Lakeman

This is a simple SIR infectious diseases 3 stock model with Susceptibles, Infectives and Recovereds stocks. In the initial description the R signified Removed and could include Deaths, Recovered with immunity to infection (Resistant) or those who had fled the epidemic. Note the need to initiate the epidemic by adding a pulse of a single infected person at time 0.

Addition of a slider for susceptibles is equivalent to accumulated total cases

SARS, MERS AND COVID are similar virus types only differing in their sub genus

The COVID outbreak has reached 150,000 infected people

This simulation allows an attempt at predicting how long the virus will persist and its longevity dependence on its high speed massive infection numbers that have reached pandemic proportions

SARS reached 8,000 infected total and ran for 9 months before stopping

MERS 2012 is still killing 8 years later with patients dying even after using interferon to try and cure them

updated 16/3/2020 from 5 years ago

DIabetes incidence from population inflow, with undiagnosed and diagnosed stocks

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.

This is the Concept map at IM-735  modified to reflect the learning after system dynamics modeling at IM-393, 

Kermack–McKendrick Epidemic SIR Infectious Disease Model - Metrics by Guy Lakeman

This is a simple SIR infectious diseases 3 stock model with Susceptibles, Infectives and Recovereds stocks. In the initial description the R signified Removed and could include Deaths, Recovered with immunity to infection (Resistant) or those who had fled the epidemic. Note the need to initiate the epidemic by adding a pulse of a single infected person at time 0.

Causal Loop Diagram of the Dynamics of Emergency Department Crowding Initial View from the waiting room 

Clone of  IM Health Expenditure australia 2015-6 (Table A3 with past year change) with 2015-6 detail added from NH Funding pool annual report website. Also current and emerging IHPA pricing classifications See also combined performance and activity stock flow IM IHPA and NHPA