Chapter 3. Introduction to business processes 29
application integration (EAI) technology to an architectural approach for IT
system integration.
Services are the building blocks to SOA. They provide the function out of which
you can build distributed systems. Services can be invoked independently by
either external or internal service consumers to process simple functions or can
be chained together to form more complex functionality and to quickly devise new
functionality.
The SOA approach means companies are able to build horizontal business
processes that integrate systems, people, and processes from across the
enterprise quickly and easily in response to changing business needs.
3.2.1 Definition of a service
SOA is an architectural approach ...