A Master Plan Instance acts as a container for billable or non-billable services. It can also be the parent plan of any number of supplemental (child) plans, or it can be a standalone plan that does not contain any supplemental plans. An account must have at least one Master Plan Instance assigned to it and a Master Plan Instance can be purchased multiple times.
A Supplemental Plan is an optional plan associated with a master plan that can be purchased multiple times. It provides the ability to add a variety of additional services that are not offered in a Master Plan Instance.
For instance, in the following scenario, a mobile phone plan is the Master Plan Instance, and any corresponding add-on plans are supplemental plans:
