Arrival window

An arrival window is the span of time, often two hours, in which a technician is expected to arrive at the customer’s address, as opposed to an exact appointment time. “Between 1 and 3” is a window; “at 1:30” is an appointment.

Key facts

• Under FCC cable rules, an appointment window must be a specific time or at most a four-hour block during normal business hours. (Source: eCFR – 47 CFR 76.309, checked Oct 17, 2026)
• A cable operator may not cancel an appointment after the close of business on the business day before it. (Source: eCFR – 47 CFR 76.309, checked Oct 17, 2026)
• If a cable technician will miss the appointment, the customer must be contacted and the visit rescheduled at a convenient time. (Source: eCFR – 47 CFR 76.309, checked Oct 17, 2026)

How long an arrival window is

Two hours is a common length in home services: short enough for a customer to plan an afternoon around, long enough to absorb one job before it running over. Longer windows trade the customer’s time for the schedule’s slack. A window that covers a whole working day asks the customer to give up the day.

Four hours is the ceiling in one federal rule. The FCC’s customer service standards for cable operators, which a local franchise authority can enforce, say the appointment window for installations and service calls must be either a specific time or, at most, a four-hour block during normal business hours. The same standards say an appointment may not be canceled after the close of business on the business day before it, and that if the technician is running late and cannot keep the appointment, the customer is contacted and the visit rescheduled at a time convenient for the customer.

Those rules bind cable companies, not plumbers or HVAC shops, but they make a fair yardstick for any company that sends someone to a home: a window of four hours or less, no cancellations at the last minute, and a call when the visit is going to miss.

Arrival window, appointment time, service window

• Appointment time. A promise to the minute. It suits work at your own counter better than work at the customer’s address, where the job before decides when you can leave.
• Arrival window. A promise about when the technician gets there, not when the job ends. A window of 1 to 3 says nothing about whether the job takes twenty minutes or the rest of the afternoon.
• Other names. The FCC’s cable rule calls it an appointment window, and you will also hear time window or time slot for the same idea. Some companies use service window for the hours they work at all, so say which one you mean.

Why it matters for a service company

Field work cannot promise a minute. The job before this one runs long because the shutoff valve was seized. The supply house has the part on the wrong shelf. The highway is closed. If you told the customer 1:30 and the truck pulls up at 2:10, you are late, and the customer has spent the gap deciding how much to trust you. If you told them 1 to 3, the same truck at 2:10 is on time.

The window is also what lets a dispatcher build a sane route. With a two-hour spread on each stop, jobs can be ordered by neighborhood instead of by whoever called first, and one overrun does not knock down every appointment behind it. A shop that books exact times is either padding every slot heavily or apologizing every afternoon.

Customers accept windows when they are told the window clearly, once, and hear from you when the technician is actually rolling. What they do not accept is a window that was never mentioned, or one promised by a receptionist who could not see the board.

How to run arrival windows well

• Book from the board the technicians actually work from, so nobody promises a window that is already full.
• Say the window once, with the date and the address, and repeat it in the confirmation.
• Send an “on the way” message when the technician leaves the job before, so the customer is not waiting blind inside the window.
• If the window is going to be missed, call before it ends, not after, and offer a new one.
• Use the first slot of the day for the jobs that cannot slip. Nothing ahead of it can run over.

On DispatchLine, the AI receptionist books callers only into windows that are open on your appointments board and reads the window back before the call ends; see scheduling.

Related terms

• After hours
• Triage questions
• Service area
• Arrival windows and hours guide
• Scheduling feature

Source: the FCC’s customer service obligations for cable operators, 47 CFR 76.309.