The order journey

The five stations an order passes, and who owns each one.

1.1Five stations#

An order passes five stations in a fixed order: checkout, payment, warehouse, courier and tracking. Figure 1.1 shows them, and Table 1.1 names their owners.

Table 1.1 · Who owns each station

1.2Hand-offs#

A station hands the order on by writing an event; the next station reads it. No station calls another directly, so a slow station never slows the one before it. The events are kept for thirty days.

1.3What the customer sees#

The tracking page reads the same events. It shows one tile per station and the promise under them; see Section 2.1.