Okay, I think we're ready to Go Live

Great! So, does it do this thing that I haven’t mentioned before but of course assumed it would do and that I feel is an essential function?

Err.... no. You hadn’t mentioned that. So, no it doesn’t. It CAN do that, but I’ll have to go back and design it to do that, then test it, and get back to you.

So it can’t go live today then? Ohhhh...