I like to use civil engineering analogies too. This cupboard one is great, I'll have to remember it. Like for people who want a 50% demo at a 50% timepoint, as

I like to use civil engineering analogies too. This cupboard one is great, I'll have to remember it. Like for people who want a 50% demo at a 50% timepoint, asking if they'd ask to drive a truck halfway across a bridge when it was half completed. I mean, you could build a bridge that way, but it would be way easier to lay all the foundations first, then build support structures, then finally pave it at the end. Another one is when someone asks to tack on a feature on top of some system that really can't support it, comparing it to asking to build a second story on a tent. They wanted the cheapest, quickest to set up, lightest on resources system, and that required certain tradeoffs. To build their new feature, it would often be easier, quicker and safer to rewrite the whole thing from scratch.