Concept: Types of Composite Services
Composite services can be hardwired or loosely wired. Each style has its strengths and drawbacks.
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Main Description

Two kinds of composite services generally are recognized:

  • Hardwired composite services
  • Loosely wired composite services

Hardwired composite services are characterized by low flexibility, owing to pre-defined flow and control of services where the flow and control is not externalized. These types of services have attractive Qualities of Service attributes such as performance . 

Loosely wired composite services are characterized by high flexibility.  Services are composed into business processes by externalizing flow and control. This type of composition exploits modeling tools to define the flows and to "wire" services into them. Composition using BPEL is an example.