Thanks Paul and Terry for your response.
Within SFC one can have utilization figures by week and day, work center and machine. For the work centers the utilization figures are taken from the production planning data.
If you take into account the main and sub work center concept I was wondering how the utilization data for the main work center should be derived. As in the given scenarios there are quite some degrees of freedom in modelling the setup.
- If work center MAIN only serves as "container" for sub work centers SUB1 and SUB2 then there is no utilization data within SFC for work center MAIN.
- If work center MAIN also appears as work center at operation level then there is utilization data only for operations that have work center MAIN. The utilization data of SUB1 and SUB2 will not be aggregated to MAIN.
In the latter case the main question is: What should be defined as the normal capacity for work center MAIN? As explained the normal capacity will be calculated from the data of the work center (i.e. basic week capacity and number of operators / number of machines). Must one aggregate the data of the sub work centers to the main?