The advantages and disadvantages of top down approach and bottom up approach?

Bottom-up approach

1.User and business awareness of the product. Benefits are realized in the early phases.

2.You can replace many manual processes with early automation.

3.You can implement passWord management for a large number of users.

4.You do not have to develop custom adapters in the early phases.

5.Your organization broadens identity management skills and understanding during the first phase.

6.Tivoli Identity Manager is introduced to your business with less intrusion to your operations.

Top-down approach

1.Your organization realizes a focused use of resources from the individual managed application.

2.The first implementation becomes a showcase for the identity management solution.

3.When the phases are completed for the managed application, you have implemented a deeper, more mature implementation of the identity management solution.

4.Operation and maintenance resources are not initially impacted as severely as with the bottom-up approach.