Depicts the current and desired future values of architecture-specific metrics for service architecture elements. The measures are selected by the enduser community and described by the architect.Performanee parameters include all performa rice characteristics for which requirements can be developed and specifications defined.The complete set of performance parameters may not be known at the early stages of architectural description, so it is to be expected that this view is updated throughout the specification, design, development, testing, and possibly even its deployment and operations life cycle phases.