All of the processing is done by the Woosage Service, which runs in the background on a windows PC on the same local network as Sage. The Woosage Service handles all communications with Sage and the website. The system is depicted in the following diagram, where the Sage components are shown in green and the Woosage components in blue.
Woosage has a processing cycle that runs as shown below (at a high level, for simplicity) and the sleeps for a period of time (user setting) before repeating.
The processing cycle normally runs continuously, but can be stopped and started from the Woosage Control Centre