Zone shapes in class based storage and multicommand order picking when storage/retrieval machines are used

Article Abstract:

The effect of varied zone layouts in class based storage on the optimal order picking tour of storage/retrieval (S/R) machines is studied. Tchebyshev's travel theory is used to design zone shapes for S/R machine travelalong a path of optimal width to maximize S/R machine capacity while maintaining storage policies for two zones of fast moving products in a three class storage system. Optimal S/R machine travel time for multi command order picking is based on the number of addresses and rack area.

Evaluation

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An interactive layout heuristic based on hexagonal adjacency graphs

Article Abstract:

An interactive layout heuristic was developed. The heuristic introduces new concepts and provides an efficient algorithm which creates adjacency graphs and the corresponding block layout. The first concept involves a hexagonal grid-based adjacency graph which possesses positional information. The second involves transformation to integrate important relationships with the outside with consistency. The third is the utilization of continuous department dimensions and position matrix of departments.

Usage, Software, Heuristic programming, Plant layout

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Storage layout of AS/RS racks based on recurrent orders

Article Abstract:

An optimal model for a single rack person-on-board automated storage and retrieval warehousing system is presented The model is constructive, requires minimal computation and minimizes the average retrieval time. Analysis of the model shows it is better than the interchange method. Although the model was designed on the assumption of recurrent orders, modifications can easily be made to adapt the model to ordersof varied frequency.

Models

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