The costs considered in the models were those for delay, warehousing, ordering and capacity auditioning; it should be clarified that only marginal costs were used for this model, e.g. only costs were included that could change as a result of a particular decision made. Raw material costs were not included due to expenditure on such materials being independent of the chosen plan.
Los costos a ser considerados en el modelo son los de tardanza, almacenamiento, pedido y capacidad adicionada; es necesario aclarar que, para este modelo, sólo se hará uso de los costos marginales, es decir, sólo se incluirán aquellos que pueden cambiar como resultado de las decisiones tomadas; el costo de las materias primas, por ejemplo, no se incluirá, dado que los gastos en este aspecto se hacen con independencia del plan elegido.