OPS.8:1 - Problem frame

An operation may contain several queues and joins. A release needs a tested configuration, a safety result and an authorized decision; a shipment needs product and documents; a case may need more than one specialist contribution. Completing one contribution does not make the whole result ready.

A queue is a selected waiting population eligible for a named service, ordered under a stated policy. A buffer protects or decouples something against a specified disturbance. A board column can describe either, both under separate rules, or neither. The policy question concerns the actual waiting and protection arrangements, not the appearance of that column.