Thus, the service life cycle strategy should categorize events based on predictability.
This can facilitate a proactive strategy that not only tackles planned events but also eliminates
unwelcome surprises that can affect business stability. Exhibit 2.5 illustrates the four major events
that a life cycle strategy should support:
??? Staged events
??? Unpredictable business and technology events
??? Random events
??? Conditional events
Life Cycle Staged Events. The traditional systems development life cycle (SDLC) methodology
is based on projects that are driven by predetermined events, often called stages. The development
Service-Oriented Life Cycle Model Structure 37
Service Life Cycle Events
Staged
Events
Unpredictable
Business and
Technology Events
Random
Events
Conditional
Events
EXHIBIT 2.5 SERVICE LIFE CYCLE EVENTS
teams involved know precisely the duration of each stage and are familiar with the corresponding
required deliverables. These stages chiefly serve as deliverable checkpoints, in which evaluation
activities such as project quality-scoring and ranking of personnel take place. For example, the
planning stage, design stage, construction stage, deployment stage, and product support stage
are the most common stages in today??™s systems life cycle methodologies. Traditionally, stage
schedules are set in stone, regardless of unexpected market events or the type of product being
developed or maintained.
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