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Operations Research

Advanced Planning in Fresh Food Industries: Integrating by Matthias Lütke Entrup

By Matthias Lütke Entrup

Construction making plans in clean meals industries is a demanding activity. even though glossy complex making plans and Scheduling (APS) structures may provide major aid, APS implementation numbers in those industries stay low. as a result, according to an in-depth research of 3 pattern clean foodstuff industries (dairy, clean and processed meat), the writer evaluates what APS platforms may still supply with a view to successfully aid creation making plans and the way the top structures presently deal with the main distinguishing attribute of clean nutrients industries, the quick product shelf existence. ranging from the pointed out weaknesses, personalized software program strategies for every of the pattern industries are proposed that permit to optimize the construction of unpolluted meals with appreciate to shelf lifestyles. The ebook thereby deals worthy insights not just to researchers but in addition to software program companies of APS platforms and pros from clean foodstuff industries.

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For instance, if the demand cannot be fulfilled completely, penalties are imposed for the lacking volume. Another tech- 18 2 Advanced Planning and Scheduling Systems nique to reduce model complexity is aggregation. Rohde and Wagner (2002) distinguish the aggregation of time, decision variables and data. When aggregating the time, several smaller periods are consolidated into a larger period. The aggregation of decision variables generally refers to the consolidation of production and transportation quantities by aggregating for example products to product families.

To solve the planning problem, APS systems use rather simple heuristics (Tempelmeier 1999a). Three types are usually available: x x x Constraint Programming is a technique to compute feasible (not always optimal) solutions to combinatorial decision problems by solving constraint satisfaction problems consisting of variables, domains and constraints. In contrast to LP/MILP techniques, the user can influence the search strategy (Klein 2002b). Genetic Algorithms use procedures (such as selection, mutation and crossover) that are recognized in the evolution of the natural world to find solutions for planning problems (Knolmayer et al.

The system can even review production commitments and re-plan the production. This procedure is called Capable-to-Promise (CTP, Number 4). Secondly, the Initial Order Promising function aims at confirming the delivery date and quantity to the customer. A company that is able to consistently make reliable promises over a long period of time creates an important competitive advantage (Kilger and Schneeweiss 2002a). Thirdly, ATP supports measures and decisions regarding temporary delivery inability.

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