Alternate Feature Services can be setup for each individual feature class in the geodatabase configuration. This allows agencies to divide their feature classes out into different Feature services. While this isn't necessary for this setup, feature services are also used when setting up edit capabilities for the webmap and in that situation it might be useful.
Setup
Feature Service
Configure a single feature class to use an Alternative Feature Service
Configure multiple feature classes to use Alternative Feature Services
What this does
When an inventory update is made in the Lucity environment (desktop, web, mobile) the information is stored in the Lucity database. At the same time Lucity tries to connect to the Feature Service (based on the provided url) and the related feature class (based on the geodatabase configuration). If it makes the connection is pushes attribute updates into the feature service, which in turn automatically updates the geodatabase.