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Workload Control (WLC) has been developed as a production planning and control approach for make-to-order manufacturing. Previous studies on WLC often assume a simplified shop where released batches are treated as independent jobs, which proceed through the different stages of processing without being split. Batch splitting allows released batches to be split into a number of smaller sub-batches so that its operations at work centres can be overlapped and its progress accelerated. This paper investigates how WLC performs under batch splitting. Evaluating the performance of WLC in this context is an important step towards the alignment between WLC theory and practice. Thus, assuming a production situation with unbalanced utilizations of manufacturing resources, the effectiveness of different dispatching rules and job release strategies are examined using simulation. Results highlight the importance of controlled release of jobs to the shop floor and the importance of differentiating between bottleneck and non-bottleneck work centres for purpose of dispatching.
This paper shows the development of transmission line
model, based on lumped element circuit that provides answers directly
in the time and phase domain. This
model is valid to represent the ideally transposed line, the phases of each of
the small line segments are separated in their modes of propagation and the
voltage and current are calculated at the modal domain. However, the conversion
phase-mode-phase is inserted in the state equations which describe the currents
and voltages along the line of which there is no need to know the user of the
model representation of the theory in the line modal domain.