vroom VS OptaPlanner

have a look at this: https://github.com/VROOM-Project/vroom

I see, thanks!

Open Route Service [1] seems to use Vroom [2] under the hood. It seems to be based on local search with some "Solomon I1" (?) heuristic. So good heuristic routes (obtained quickly), not optimal ones.

[1] https://openrouteservice.org/

[2] https://github.com/VROOM-Project/vroom

However, if you need to solve constraints etc., see: https://www.optaplanner.org/

Try looking for something built around Optaplanner - basically taking the end game of rostering and working backwards.

OptaPlanner takes some of the items tracked in tool like Odoo and creates plans based on them. I.E. how do you manage shifts while juggling multiple constraints (Jerry can only work weekends, Jeff can only work afternoons, Jim can work weekends but only on double time, etc.)

There is a library out there called Optaplanner that is designed for optimization of NP complete problems. It is hard to tell if that is exactly what this is, but I think you should be able to use this regardless.

Just stumbled upon https://www.optaplanner.org. Looks very interesting but also really overkill.

OptaPlanner - a generic scheduler.

OptaPlanner

I've never used it but it sounds like OptaPlanner may be a scheduler in the same vein?