Office-printer data flow matters because a document can look correct in an application yet change in a driver, remain in a spooler, inherit the wrong identity, route to another device, rasterize with missing fonts, print partially, retry into duplication, or report completion before anyone controls the output.
This explainer follows content, page descriptions, settings, spool files, identities, servers, queues, raster pages, device events, output counts, meters, and audit entries. Separating these layers identifies whether a failure belongs to source rendering, policy, transport, hardware, physical custody, or accounting. The final control is physical custody: reported completion must be reconciled with pages actually produced, collected, and accepted by the downstream owner.