Dispatch software assigns work to the people and vehicles that will do it, against time. That is the whole category, and the reason it has four names is that it grew up in four places at once: trucking, field service, emergency response and delivery. For a small service business the useful definition is narrower. Dispatch is the moment somebody decides which technician goes to which job next, and software earns its keep when that decision is made from a board that knows where everybody already is.
A dispatch board is not a calendar
A calendar shows appointments. A dispatch board shows unassigned work beside the people who could take it, with travel between jobs visible, so an assignment can be made and changed in one place. The distinction matters because a calendar makes you think in slots and a board makes you think in routes, and the second is what saves a truck an hour a day.
What dispatch management software and dispatch scheduling software each signal
Dispatching software usually means the act of assigning. Dispatch management software usually means the same thing sold to a manager with reporting on top. Dispatch scheduling software means the board is joined to the schedule rather than sitting beside it. Treat them as marketing rather than as capability, and judge the product on whether reassignment takes one drag or three screens.
What actually decides whether it works
Three things, none of them on a feature list. Whether the technician sees the change on their phone without being called, whether the job carries its own history so the dispatcher is not phoning the office for context, and whether a reassignment updates the customer. A board that only the dispatcher can see moves the problem into that one person's head.
Questions people ask about dispatch software
What is the difference between scheduling and dispatch?
Scheduling decides what happens on which day; dispatch decides who does it and in what order today. A small business often does both in one sitting, which is why the products merged, but the second is the one that changes hour by hour and needs to be visible to the people in the vans.
Does a two-technician business need dispatch software?
Rarely as a separate product. What it needs is the work orders and the day's plan on one record both technicians can see. The threshold is usually the first time a job is reassigned while somebody is already driving, because that is when a phone call stops being enough.
What breaks first when dispatch is done on a whiteboard?
The record of what changed. The board shows today and forgets yesterday, so when a customer asks why the visit slipped or an invoice is queried, nobody can reconstruct the day. That is the cost that arrives weeks later.