When the user wants to model and solve vehicle routing problems — the capacitated VRP and its main variants (time windows, multi-depot, heterogeneous fleet, pickup-and-delivery) — via two- and three-index MIP formulations, savings and sweep construction, ALNS improvement, and OR-Tools routing. Also use when the user mentions "vehicle routing," "VRP," "CVRP," "time windows," "fleet," "delivery routes," or "Solomon instances," or when several capacity-limited routes must start and end at a depot. For single-vehicle tours, see traveling-salesman-problem; for destroy-repair design in depth, see large-neighborhood-search.
