Benchmark generators for reactive multi-mode project scheduling problem after a mode modification

During its execution, a project can undergo unexpected events. Hence, reactive algorithms are crucial. Since no benchmark instances are available for reactive algorithms, we propose three complementary benchmark generators. All these generators lean on a baseline schedule. Then, they suppose that at a certain date of the project progress, the planned mode of a future activity should change. This fact is tackled with different manners according to the chosen generator, which in its turn depends on the user convenience.