A replacement should help with the work that prompted the search. That might be filling a gap in a rep's route or dividing accounts when someone joins the team. Bring one of those tasks into a trial with your own data and check how much work it takes to complete.

Why the closest-next-stop rule sends reps across town twice, how to sequence a call list around fixed appointments, and what backtracking really costs.

Why an unweighted sales heat map is just a population map, how to normalize before you map, and how to weight a heat map by revenue not marker count.

How much of a technician's day is driving, where the extra miles get created in scheduling, and how zoning and sequencing reduce windshield time.