Variability

Definition

The configurability quality subfactor, variability, is the extent to which an application or component exists in multiple variants, each of which implements a different subset of functional requirements and associated quality requirements.

Measurement

Variability is typically measured in terms of:

• TBD.

Requirements

See variability requirements.

Mechanisms

Typical mechanisms for implementing variability include:

• TBD

Guidelines

The following guidelines have been found to be useful regarding variability:

• Variability may refer to variant applications or components that coexist in time or that will be developed over the course of multiple releases of ever increasing capabilities.
• Different variants can differ in terms of any specified combination of:
  • Operational requirements.
  • Data requirements.
  • Quality requirements.
  • External API requirements.