The details would be things such as the requirements associated with the white glove installation process:
Size of doorways, weight bearing capacity of floors, electrical service parameters, environmental conditions, etc.
e.g. Does it actually handle electrical voltage fluctuations of +/- 1V, or whatever is advertised?
The guaranteed parameters of a fully set up machine:
Minimum performance metrics, software compatibility with whatever the sales department promised, maximum power draw, etc.
e.g. Can it reliably hit X metric (FLOPS, IOPS, Integer calculations, etc.)?
And so on.
