After introducing the model of a mDWC we now turn to the solution procedure. As described in the introduction we formulate the solution of the simulation as an optimization problem. Instead of considering all process variables x var = (x j ) j∈Ivar and all MESH equations g i , i ∈ I MESH in the optimization problem, we select a subset of the process variables as optimization variables x opt = (x j ) j∈Iopt with I opt ⊆ I var . Using values for these optimization variables, all process variables are calculated using a part of the MESH equations. This can be described as a map