Projects are usually performed in relatively unstable environments. As such, changes to the baseline

schedules of projects are inevitable. Therefore, project progress needs to be monitored and controlled.

The ...

We investigate the inverse 1-median problem on trees where it is possible to

change the weights of vertices or to reduce the length of an edge to zero. An

O(n log n) algorithm is designed for solving this ...

. As an application of the surrogate version, a heuristic dual-ascent procedure is proposed for the uncapacitated facility location problem. Numerical tests on some classical instances and real-life applications show that the algorithm provides near-optimal solutions...