My sleeve-blank handshake plan has two meanings of ready: machine supplier says request received, integrator says area available. How do I get both meanings owned and agreed?
Can both suppliers walk through request received while preparation is still incomplete? Write the producer, consumer and allowed inference for each condition. That example should expose why one shared word is not enough.
Keep ordinary sequence availability distinct from the independently assessed safety permissions. Both suppliers can agree that an area is ready for the next ordinary step without that phrase becoming authority to bypass the cell's protections.
Does that missing response have a named deciding party and retained request state, or merely a timeout number? The latter won't explain what either side should do after the wait ends.
And don't price the handover as finished because the two normal labels are clearer. That unresolved exception is precisely what reaches maintenance later.
Display meanings are included in the request. No agreed exception lifecycle back yet, so planning remains open beyond the normal receipt-and-availability sequence.
Retain the received-but-unavailable paper example with that open item. It stops a clean normal demonstration later being used to claim that the unresolved waiting and recovery decisions were covered too.