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5 Development of a Simulation-based Methodology …
state is dependent on the production task and quantity, e.g., the producing state
(Figure 5.8). The required parameters to model the machine behavior in a realistic
manner, need to be included in the machine logic.
Figure 5.8 Machine logic and power consumption profile with varying production quantities
The production process parameters can be divided into technical and organizational data (Figure 5.9). To structure the machine behavior, possible machine
states and allowed machine state transitions must be defined. Equally important
is the definition of machine state restrictions, e.g., a minimum duration of a state.
A machine might have to remain in off mode for at least an hour before
rebooting the machine for production. These restrictions will be used for the optimization later. As the off state does not have any energy consumption, it might
be the most favorable option for non-productive machine times when it comes
to minimizing the energy consumption. Restrictions cause this fact to be different
because the production break may not be that long, so lingering in standby or idle
mode is the more appropriate choice in that case.
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