Identify some of the major components of enterprise portals.What value do enterprise portals offer

Identify some of the major components of enterprise portals.
What value do enterprise portals offer a health care delivery organization in terms of technical support, upgrades, and maintenance?
How do the costs, direct and indirect, of enterprise portals relate to non-portal based applications?
How do HEAIPs enable large scale integrated HIS applications?
What factors might lead an organization to decide to adopt a HEAIP approach? What factors might steer it away from this solution?