Our planned FR10 lathe interface uses ready for both request received and loading area available. Which question gets the suppliers beyond agreeing that readiness is important?
We had a review where everyone agreed with the same word because they were imagining different moments. Drawing the normal sequence didn't expose it. Asking the machine person to leave the machine busy after receiving the request did. Then the robot person had to explain what they would wait for, instead of nodding at the word ready.
I've put the busy-machine case first. Receipt can occur in that case; availability cannot. We need names that preserve the distinction in the interface table.
Louis, yes, the receiver's interpretation belongs beside the sender's definition; otherwise Clara gets two improved documents that still disagree with each other.
Naomi and Louis, both teams now put availability under the machine side and require the receiver to respond to its loss. They're still arguing about the interrupted-transfer state.
I wouldn't rush that last argument. Before transfer and during transfer may need different responses, and neither should be improvised from a signal name. Have them identify the physical state they can establish in each case and the authorised recovery owner; that is where our tidy table grew useful.
We have separate receipt and availability entries signed by both teams. Interrupted transfer stays an explicit design issue, with the machine and integration leads jointly responsible for resolving it.