[omarshammas]

Services (unlike products) are typically constrained by the number of personnel available.

How does Amazon determine a company's availability when a customer books a job?

Most of these business I'd guess are probably in the 1-10 people range and probably not the most tech savvy. I can't imagine an adequate solution unless Amazon provides scheduling software and enforces adoption.

[curun1r]

If you look at the list of services, it's basically a list that does not include any service that requires an appointment. My company does scheduling for small businesses and, in industries like auto, there's just a maximum number of appointments each day that we're allowed to book.

It looks like Amazon punted on the hard part by constraining the availability to only specific services.