Marketing tactical level

In an effort to ensure a more responsive supply chain and achieve higher levels of customer satisfaction, supply chain managers often seek to minimize the time between order placement and finished product delivery (to the customer.) This requirement is addressed in the tactical submodel by including the additional objective of minimizing total weighted transit time, which is defined here as the time required to ship one unit of raw material/final product from one supply chain element to another multiplied by the number of units to be shipped, summed over all raw materials types, suppliers, plants, warehouses, markets, and time periods. Hence, the corresponding goal constraint is expressed as... 

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