Express operational requirements as a set of functional requirements with straightforward goals. Typically, you create operational specifications for areas such as:
End-user functionality
Reduced response time
Availability and uptime
Reduced error rate
Information archival and retention
Express operational requirements in measurable terms that all stakeholders can understand. Avoid ambiguous language, such as “adequate end-user response time.” Examples of operational requirements could be the following:
Ability to restore services within 10 minutes of an outage
Ability to replay the last 48 hours of inbound message delivery
Online transactions completed within 60 seconds during peak periods
End-user authentication completed within four seconds during peak periods