Fabricator, Retailer or Installer: Who You Are Hiring

The countertop trade has three business models operating side by side, and from the showroom floor they look identical. Understanding which one you are buying from tells you who owns the mistake if a slab arrives with the sink cut in the wrong place.
The Fabricator

A fabricator buys slabs, cuts them on its own saw, polishes the edges, and sends its own crew to install. One company, one contract, one phone number. When something is wrong, there is nobody to point at. This is usually the cleanest arrangement and often not the cheapest headline price, because the shop is carrying the equipment cost and the liability.
The Retailer

A home improvement chain or a kitchen showroom sells you the job and subcontracts the fabrication and installation. The contract is with the retailer, the crew in your kitchen works for somebody else, and the scheduling runs through a coordinator rather than the shop. Warranty claims are typically well handled because the retailer has a process, but the process is slower and the crew has no authority to make a judgment call on the spot.
The Stone Yard
A yard sells slabs and may refer you to a fabricator it works with. Here you can end up with two contracts: one for material and one for labour. The advantage is slab selection, because you are standing in front of the actual stone rather than a four inch sample. The risk is the gap between the two agreements, which is where a cracked slab argument starts.
How to Tell Which You Have
Ask three questions. Where is the stone cut, and can I see the shop. Do the installers work for you or for a subcontractor. If the slab breaks during fabrication, who replaces it and how long does that add. A fabricator answers all three immediately. A retailer answers the third with a policy. A yard answers the first and hesitates on the other two.
Why It Matters More Than Price
Nothing about this makes one model correct. Plenty of retailer jobs go perfectly and plenty of small shops are excellent. The point is that the answer changes what you should put in writing. With a subcontracted job, get the tear out, the plumbing reconnection and the template prerequisites listed explicitly, because the coordinator and the crew are reading different documents. With a single fabricator, a shorter contract is usually fine, because one company is standing behind all of it.