Fusion absence management allows for more complex business requirements to be configured through a simple user interface without coding. It provides various plan types like accrual, qualification, and no entitlement plans that can be used to model different absence scenarios. This document provides step-by-step instructions to set up an annual vacation absence plan with accruals calculated based on years of service and various rules like maximum balance and carryover limits implemented through derived factors, repeating time periods, and expression builder.