Research Article
An Improved Genetic Algorithm Based Robust Approach for Stochastic Dynamic Facility Layout Problem
| Indices: | | i,j | Indices for facilities where i, j=1,...,I, I= number of facilities in the layout | t | Index for periods where t=1,...,T, T=number of periods in the planning horizon | k,h | Index for locations of facility where k, h=1,...,L, L=number of locations in the layout | z | Indices for transport device types where z=1...,G, G=number of transport device types | Parameters: | | Dkh | The distance between location k and location h | Akh | The cost of rearrangement from location k to location h | Pkhz | The cost of transporting unit material from position k to position h using device z | Qtij | The random variable of the total material flow from facility i to facility j in period t | Variables: | | xtik | Binary variable:1, if facility i is placed at location k in period t; 0 otherwise | ytzij | Binary variable:1, if using device z to transport material between facility i and facility j during period t; 0 otherwise |
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