A member asked about 'POC: Proof of Concept' demos, typically asked for during a bid response by a potential customer.
As an integrator, I thought it was a great buying tool where the customer asks the vendor to 'put your money where your mouth is' for meeting bid requirements. However, it was costly and sometimes impossible to furnish a proof of concept given the broad mix of systems, cameras, and specialized devices to integrate.
With that said, what is your standard approach for performing a 'POC demo'? If you're a buyer, what level of 'proof' are you looking for?