8 SOLUTION TO DESIGN TRANSFORMATION
and the addition of a service that delivers new functionality. These aspects may influence
a service??™s accessibility and visibility in the environment in which it operates.
2. Changes that influence external service structures and a packaging solution that is deployed
to production. External structures pertain to an overall logical composition of a solution in
which services are arranged in certain formations (patterns) to achieve a design strategy,
such as interoperability, reusability, asset consolidation, and loose coupling. This stylized
arrangement of solution services is discussed in greater detail in Chapter 13.
3. Changes to business or technological functionality that triggers transaction redesign or
enhancements, which characteristically would require reorchestration of transaction activities.
Orchestration is typically affiliated with the overall workflow of message exchange
between consumers and services. This includes coordination of message exchange operations
and synchronization of message request and response activities.
Exhibit 1.8 illustrates the major conditions that lead to the redesign of solution service:
revision to service visibility and accessibility, modification to external structure and packaging,
contract changes, alteration to service relationship, and transaction remodeling.
SERVICE-ORIENTED MODELING DISCIPLINES: INTRODUCTION
A modeling discipline is a field of knowledge that offers best practices, standards, and policies
to facilitate service-oriented development activities during a service??™s life cycle.
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