[OPTIONAL, many]

Technical Definition:

Design decisions, design choices, alternative considerations, tradeoffs, etc., present in the service expression. What are the implications of the choices on key factors, e.g.,implementation, performance,reuse, extensibility, portability, security, data privacy, etc., including "why", not just what choices were made. All of the aspects listed in the Aspects of Service Design [URL] SHALL be considered for inclusion. These are decisions that influence the overall design of the service expression and what is exposed to users of the service expression. It does not include design decisions that only affect the internal structure, organisation or operations of the service expression.

Commentary:

A description of the decisions involved in creating the Service Expression and explanations of the rationale behind the choices. All Aspects of Service Design guidelines [URL] must be considered for inclusion in the discussion.