Once an activity has started, a time to completion is calculated, often using a sample from a statistical distribution. For example, a processing activity can only start when a certain quantity of working material is available, a person to run the machine and an empty conveyor to take away the product. It also has a description of the logic governing each activity. machines, materials, people, etc.) and ‘activities’ (e.g. ![]() The effect of such a delay may be amplified (or absorbed) when we consider the effect on downstream units.Ī simulation model has ‘entities’ (e.g. ![]() If we assume that this is always the case, we lose the understanding of what happens when, say, there is a breakdown or a halt for routine maintenance. For example, a line may run at an average rate of 1000 units per hour. Simulation models aim to replicate the workings and logic of a real system by using statistical descriptions of the activities involved. ![]() Gibson BTech, MSc, CEng, FIMechE, FIMarE, FRSA, in Plant Engineer's Reference Book (Second Edition), 2002 5.5.1.3 Simulation models
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