What does each team expect the other side to do when ready turns on?
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Both suppliers ticked ready while describing different events
AdamBlair · 2025年10月17日 07:29 UTC
19 条回复
Can you draw the sequence with event names instead of signal names? I would take ready off the first draft altogether.
-2分Who clears it?
24分Rebecca's approach helped us untangle a similar table, though we still needed the eventual signal names alongside it for maintenance to follow the screen.
8分Maya, one team expects us to wait after ready and the other expects the sequence to proceed. Sam, they also disagree about who clears it. Rebecca's event-only version may save us another meeting about the spelling.
22分Yasmin, yes, event wording first and screen wording beside it once the meanings agree.
16分Adam, what happens to an accepted request when communication drops? That is where our tidy drawing fell apart.
21分Was yours forgotten, Rebecca, or repeated?
1分Repeated in the software test. The receiver remembered accepting it, but the sender restarted as though nothing had happened. We needed the controls people to sort that out, not another label.
16分Rebecca, ours has a blank box for communication loss. I had treated that as a later detail. Your example is useful; I have added it to the supplier discussion alongside the normal loading sequence.
13分A blank box is easy to overlook when the normal path fills a page, and the operator will meet that box without the two suppliers beside them.
13分Also, request received must not be treated as permission to enter the machine area.
23分Agreed, Maya. We are calling it request accepted in the discussion copy and keeping the access conditions separate. Neither team has signed the revised sequence, so these are proposed meanings, not a commissioned interface.
15分Maya, would you put the access conditions on the same drawing? Ours became hard to read once every dependency was squeezed in.
24分Linked detail is fine, Rebecca, as long as the sequence points to it unambiguously.
4分Adam, is there a request identifier in the proposal?
17分Sam, I would let their controls teams choose the mechanism, but I do want them to explain how a delayed answer is matched to the request it belongs to.
-2分Sam and Yasmin, nothing has been chosen for matching requests yet. I have asked for a worked example with a delayed answer after reconnect. Thanks Rebecca for the restart story; it made the missing case much easier to explain.
8分Good. Ask them to walk it from both ends. We each thought the other application was retaining the bit that mattered.
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