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Two identical lifts: how you split bookings between them
If two units do exactly the same job, offer them as a single service and assign whichever one's free when you confirm each booking. If they don't, keep them separate, even if they look alike.
By Yodai · Published September 7, 2026 · Updated October 12, 2026
A shop has two identical lifts: same brand, same max weight. A customer goes on the website to book Thursday's ten o'clock inspection. The site asks them to choose "Lift 1" or "Lift 2," as if they were two different services. They pick Lift 1.
Half an hour earlier, another customer had already booked Lift 1 for nine thirty, with an hour of work ahead of it. Lift 1's schedule is full at ten, and the website tells this customer there's no open slot. Lift 2 is free all morning. The customer has no way of knowing that, closes the tab, and calls the shop down the street.
The mistake is in how the lifts are offered
There are two ways to offer those lifts on your website. The first is to list one service per lift: "Lift 1" and "Lift 2," each with its own schedule and its own open slots. The second is to offer a single service, "Inspection," without having the customer pick a lift, and assign each booking to whichever lift is free when you confirm it.
The first option seems clearer when you're setting it up. It's what most people choose the first time around. And it's the one that loses bookings, because a customer doesn't compare schedules before booking: they check one slot, and if there's nothing open under the name they happened to land on, they leave.
the booking only checks one specific lift's schedule, not both together
One service, and you choose the lift
Offering a single service doesn't mean the two lifts stop being two separate things for your shop. Each one still has its own schedule for the day, on your board or your sheet: if Lift 2 is down for its own maintenance, you note that only for Lift 2, not for both.
What changes is the face the customer sees. Instead of two buttons competing for the same time slot, they see just one: "Inspection." You assign the lift afterward, when you confirm the booking, based on which one is free. If two inspection requests come in for ten o'clock, one goes to each lift; if a third comes in, you don't confirm it and offer a different time instead. First, check one thing about your booking site: if it only allows one appointment per hour, as soon as you confirm the first ten o'clock inspection, it won't let anyone book another at that time, even if the other lift is free. In that case, you take the second one yourself, by phone or text, and add it to the schedule for whichever lift is open.
When two units aren't really the same
The costly mistake isn't the one above, it's the opposite one: lumping two units that don't do the same job into a single service. A lift for cars and one for large vans aren't the same unit just because you call both of them lifts. If you combine them, you can end up confirming a van for a time slot when only the car lift is free, or giving the big lift to a small car and having no room for a van that afternoon.
The same goes for two salon chairs if one is next to the shampoo sink and the other isn't, or two classrooms if one has a projector and the other doesn't. The rule is simple: it should truly make no difference to any customer which of the two units they get.
What the customer sees, what the shop manages
- The customer picks Lift 1 or Lift 2 before knowing whether either one has an open slot
- An open slot on the other unit doesn't count if the customer clicked the wrong name
- The customer only picks the time, without thinking about lifts
- You assign the specific unit when you confirm, based on which one is free
- It only works if it truly doesn't matter which of the two units they get
Which one to pick: If the two units do the same job, offer them as a single service and assign them yourself when you confirm: giving each unit its own button creates an open slot the customer might never see. If they don't do the same job, keep them separate, even if they share a name and size.
Switching from one service per lift to a single service doesn't change how each lift actually works, only how it's presented on the website and who does the assigning: you, when you confirm each booking.
It's the difference between a customer who picks the wrong lift and leaves, and one who requests the time that works for them and leaves the assigning to you.
- Units that are truly interchangeable get offered as a single service, not with a separate button for each
- The customer picks a time; you assign the specific bay when you confirm, and if your site only allows one appointment per hour, you add the second one yourself by hand
- Only combine units where it wouldn't matter to any customer which one they get
- Combining them doesn't change how each one works, only how it's presented and who does the assigning
Test yourself
Answer before opening each one. If one gives you trouble, go back to the section that explains it.
1. A hair salon has two chairs, but only one faces the big mirror. Should they be offered as a single service?
No. If any customer might prefer one over the other, they're not truly interchangeable; keep them as two separate units even if they offer the same service.
2. A car wash has three identical tunnels, same machine, same wash time, and right now each one is a separate service on the website. What changes if you combine them into a single service?
The customer stops choosing a tunnel and just picks a time; you're the one who assigns the tunnel when you confirm, whichever one is free. You stop losing bookings that used to fall through when someone picked the busy tunnel while the one next to it sat open, as long as your site allows multiple appointments at the same time; if it only allows one, you take the rest of that hour's bookings yourself, by hand.
3. A tutoring center has two classrooms the same size, but only one has a projector. A teacher asks to offer them as a single option to simplify the website. Should you?
No, not if any class needs the projector. Classes that don't need it can go into a single service, assigned when you confirm; the ones that do need to be booked for that specific projector classroom, by name.