The process drills to 1.4 Fetch auction results, the process spec. The flow entering from the left is auction results, drawn against its two sources on the context diagram. Auction results (S5) has an arrow each way: the run merges what it fetches into what the store already holds. The run ends with an error and writes nothing when Auction results (S5) is missing or lacks a column of the table it reads. The amber circles are shared modules (SharedModules.md), not process steps of this diagram.