Each company has its own business requirements and policies that must be followed. For example, a new employee must be granted access to applications, resources, and physical buildings. If the employee is a salesperson, he or she has a different set of requirements than a marketing person.
Developing a set of policies that work with Identity Manager takes time. If you need to deploy a new Identity Manager solution, you must go through the process of defining the business logic for each deployment. This is very time-consuming work.
In addition, you must validate that the business policies are being followed, and define and enable the action to take when a policy is violated.