Integer programming Personnel 2 Resource allocation 2 Resources allocation 2 Approximate resource allocation 1 Branch-Price-and-Cut 1 Branch-price-and-cut 1 Classification yard 1 Classification yards 1 Column generation 1 Crew rostering 1 Decision making 1 Economic and social effects 1 Engines 1 Fairness 1 Heuristic methods 1 Integrated crew planning 1 Job resources 1 Job sequencing 1 Linear programming 1 Locomotives 1 Mixed integer optimization 1 Network node 1 Quality of service 1 Quality-of-service 1 Railroads 1 Railway optimization 1 Railway optimizations 1 Resource allocation problem 1 Resource scheduling 1