Ghiani et al. [65] study the problem of simultaneously scheduling
crews and vehicles shifts. In particular, given a set of waste
management tasks to be performed by a single company in an
integrated urban waste management context, they propose both
an optimization model, and a fast constructive heuristic. As a
minor contribution, they also select, for each task, the best
combination of days of the week when it will be performed,
according to a pre-defined weekly frequency