Arkkitehtuuritasot

• The Business layer is about business processes, services, functions and events of business units. This layer "offers products and services to external customers, which are realized in the organization by business processes performed by business actors and roles".

• Business Process?

• The Application layer is about software applications that "support the components in the business with application services".

• Application ?

• The Technology layer deals "with the hardware and communication infrastructure to support the Application Layer. This layer offers infrastructural services needed to run applications, realized by computer and communication hardware and system software".[4]

• Hardware and communciation

All Sources Wikipedia