[tintor]

"we have 4 engineers working on your project" (and also on 5 other projects)

Does it matter how many engineers work on supplier's side?

Supplier is tasked to deliver the project. It is up to them to figure out how many people would they need, and to manage them.

[svachalek]

Depends how billing works, but it's pretty rare to see terms that say we'll deliver exactly what you asked for, on a fixed price and fixed timeline, and take all the liability for failure. To some degree or another you are paying for time and effort, which are easy to misrepresent.

[jpalawaga]

if your supplier promises you an iPhone 17 Pro, and then delivers you a Pixel 4a because 'thats all you need', you will be understandably miffed.