Scheduling of multipurpose batch chemical plants. 2. Multiple-product campaign formation and production planning

The single-product campaign formation decomposition algorithm, which is presented in part I, is extended to identify dominant multiple-product campaign based on the same linear dominance property used by Mauderli and Rippin. A production planning formulation for multipurpose batch plants is presented that selects from the set of previous by identified dominant campaigns and accounts for changeover and startup times of the production lines in each campaign. The dominant campaigns are then identified for the example multipurpose plant from Mauderli and Rippin, and several production planning problems are solved to illustrate the improvement in plant performance using the optimal dominant campaigns compared with the campaigns identified by Mauderli and Rippin