Slide 25 of 42
Notes:
A federated architecture provides a subsystem that supports each business function. These machines (workstation or mainframe) should talk to each other in exactly the same pattern and pathways as do their users.
This brings several advantages over traditional central database systems:
- Each subsystem is under it's owner's control --- empowering the users to set it up with the support functions for the way they run their shop. This feels better and is more responsive to change, than the situation where everyone has to negotiate with th
- When the business is reorganised, it is easier to reorganise the software. For one thing, it's easier to see what will be affected; and also the changes just mirror the business changes. The illustration shows a firm that used to suffer from 'dumping' o
- Most system crashes only affect one department at a time.
The downside of federated architecture is a tendency to replication: Purchasing have their list of purchases, and Goods Inwards have their list of expectations. However, the advanced technology of replication and the cheapness of disk space make this much
