Keloharju,Raimo, "Simplification by Planning: The Third Way", 1987
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This paper puts forward the idea that essential parts can be removed from a SD model without harm if the model is revised successively during the simulation. The revision requires an optimization package, called DYSMOD (Dynamic Simulation Model Optimizer and Developer). A multi-stage production model, developed by J. M. Lyneis, is used for demonstrating that the idea works in practice.