This composite structure formation
can often improve service reusability rates in a production environment. But these architectural
benefits can be utilized even during the design-time season, when developers can share the
Service Life Cycle Timeline
Start End
Service Life Cycle Seasons and Disciplines
Service Life Cycle Events
Design-Time Season Run-Time Season
Disciplines Disciplines
Service Life Cycle Continuous Disciplines
Service Life Cycle Workflow
Trading Service
Equity Trading Service
Fixed-Income Service
Mutual Funds Service
EXHIBIT 3.2 COMPOSITE SERVICE DEVELOPMENT WORKFLOW
52 Ch. 3 Service-Oriented Life Cycle Perspectives
service construction burden by developing and testing smaller components. Consequently, the
breakdown of services into smaller logical units can ease service construction, influence the
overall development process, and affect timetables and the quality of the delivered artifacts.
So, how can a composite service be illustrated by employing the service life cycle work-
flow? Exhibit 3.2 exemplifies a trading service that started its life cycle as a single entity but later
evolved into a composite service made up of the equity, fixed-income, and mutual funds trading
services. Note that this aggregation process occurs during the service life cycle design time.
SERVICE WORKFLOWS IN THE RUN-TIME SEASON. Service workflows are one of the most
practical mechanisms to describe the treatment of services in a production environment where
operations are frequently affected by business and technological events.
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