Another important implementation issue is the modeling of switches and their interactions with one another in the Optimal Flow Pattern approach. For example, once a normally closed switch is opened in the process converting the meshed network to a radial one, a normally open switch must remain closed in order to keep the loads downstream from the opened switch connected. The selection of such a normally open switch is not trivial if more than one such switch exists -- which is often the case. In the implementation of the Optimal Flow Pattern approach it is also important whether and how network ampacity constraints are taken into consideration. Including ampacity considerations impacts the final results and the efficiency of the algorithm. Implementation issues are also extremely important if numerical efficiency is to be maintained.
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