Consideration to system specification and construction changes:

• The system context(such as requirements, cost, schedule, operating and support enviromnets)

• The Capabilites legacy systems and products in the marketplace for components.

Development process changes

• from a top-down partitioning to a bottom-up assembly of avilable Components

Not only engineering activities such as requirements specification change to support simultaneous consideration of system requirements and the marketplace, but so must acquisition processes and contracting strategies.

The design, development, and maintenance of component-based systems, and the migration of legacy systems towards components are complex.