چكيده به لاتين
Abstract:
Traditionally, production and transportation planning decisions in supply chain environments have been made sequentially and independently. The most habitual procedure was to proceed first with production planning or lot-sizing calculations, used to determine the quantities of each finished good to be produced in a given planning horizon, and to later establish transportation decisions for distributing manufactured products to customers in a separated way. However, in today’s globalized supply chains and high competitive markets, firms have to guarantee the efficiency of their resources, increasing customers’ service level and reducing lead times and stocks. In this sense, the simultaneous consideration of production and transportation planning activities in an integrated manner may lead to increased efficiency and cost savings.
In a production routing problem, four critical decisions have to be made: (1) how many items to manufacture each day; (2) when to visit each customer; (3) how much to deliver to a customer during a visit; and (4) which delivery routes to use.
A production routing problem optimizes jointly production, inventory and transport routing planning decisions by integrating a lot-sizing problem to determine production amounts and a vehicle routing problem (VRP) to determine delivery routes. Hence, the production routing problem is a generalization of the production planning problem with direct shipment and of the inventory routing problem (IRP).
Keywords: Supply chain-production planning- vehicle routing-set up times- environmental problems
