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5 Development of a Simulation-based Methodology …
Figure 5.2 Overview of the hybrid simulation approach for the energy consumption model
of a production. Adapted from [DG2015, p. 1616]
machine level is again continuous in nature and can be represented using the SD
paradigm. The interaction of the described levels is presented in Figure 5.2.
Material flow and process changes on meso and micro level affect the total
energy consumption of the production. Changes on the meso and micro level will
directly affect the outcomes on macro level, e.g. the reduction of parts in the
material flow on the meso level will result in a lower total energy consumption
depicted on the macro level. Interactions between meso and micro levels take
place, when the work flow entities (parts) run through the processing by the agents
(machines). The agents can cause delays on the meso level when their internal
state is not production ready as demanded by the workflow. On the other hand, the
workflow can affect the agent’s behavior by not delivering entities and forcing the
agent “overthink” their machine behavior due to process changes on meso level,
making them behave as efficient as possible with regards to the overall objectives
defined on macro level.
Thus, the implementation in a simulation requires definition of three blocks, a
production flow component, a machine component, and an energy component, all
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