Duarte, AntónioCarvalho, J.M. Valério de2012-07-242012-07-242010Duarte, António J.S.T.; Carvalho, J.M. Valério ( 2010). Parallel machine scheduling using free software: an application. In EURO 2010 - 24rd European Conference on Operations Research. Lisboahttp://hdl.handle.net/10198/7307We will show how to implement large scale optimization by only using freely available software tools. We solve exactly a parallel machine scheduling problem with identical parallel machines and malleable tasks, subject to arbitrary release dates and due dates. The objective is to minimize a function of late work and setup costs. We use the COIN-OR BCP framework to implement column generation to solve a model that results from a Dantzig-Wolfe decomposition, and also CRIFOR MCFZIB to solve an equivalent network flow model. Computational results are presented.engconference object