The three main types of Service Level Agreements (SLAs) are:
- Customer-based SLAs: These are tailored for individual customers, covering all the services they use under a single agreement.
- Service-based SLAs: Such SLAs apply the same service standards to all customers who use a particular service.
- Multi-level or Hierarchical SLAs: These SLAs are structured to cater to different levels within an organization. For example, at the corporate level, customer level, and service level.