Using Model Structure Business Structures 6k B John Hayward - PowerPoint PPT Presentation

Exploring System Behaviour Behaviour Using Model Structure Business Structures 6k B John Hayward School of Compu?ng & Mathema?cs 3k Speed Slow University of South Wales, UK up + Down - john.hayward@southwales.ac.uk R 0 19 th UK System Dynamics Chapter Annual Conference – April 2017 0 25 50 75 100 Years Business Structures Loop Impact Balancing Behaviour R B Dominant Loop - + - B R +

Reinforcing Behaviour Reinforcing Behaviour Dominant Loop Largest Contributory Loop Reinforcing Behaviour Reinforcing Behaviour Dominant Loop Set Dominant Loop Set

Stella Architect Structure -> Behaviour 1. What behaviour do we seek to explain? Stocks – Curvature (speed up +, slow down -) hKps://exchange.iseesystems.com/ 2. What structures do we use to explain it? Search: Loop Impact Feedback Loops (R, B) 3. How do we measure the effect of a structure? Select: Limits to Growth Archetype Loop Impact – RaDo measure of change Play 4. How do we decide which structure is dominant? Dominant Loop Set, alternaDvely: largest contributory loop Impact Impact of Loop on A = Change in Flow A Change in A = Change in Flow A given change in B X Change in B Change in A Flow A A Impact of Loop on A X Impact of Loop on B = Loop Gain Flow B B