# Services
A service or contract is always linked to one of your customers or suppliers. A service is time-bound and can be seen as an assignment or a series of assignments that has to be carried out over a certain period, also called a milestone. A service is limited in time.
# Types
# Frequency
A service can contain one or more rules for which an action is required to start a workflow:
The following information can be configured:
- start date
- end date
- frequency of the rule (weekly, monthly, 2-monthly, 3-monthly, 6-monthly, yearly, 2-yearly, 3-yearly)
- workflow
PLEASE NOTE
When a workflow is completed, you will be asked to start a new workflow based on the service and its frequency.