Which performance attribute involves assessing the frequency of responses?

The performance attribute focused on assessing the frequency of responses is tied directly to the concept of timeliness. Timeliness measures how promptly responses occur in relation to a specified requirement or context. In many systems, it is critical that the responses happen within designated time frames to ensure effectiveness and reliability.

When considering the frequency of responses, the key aspect is how quickly those responses are generated in relation to the demand or the occurrence of events requiring a response. Timeliness encompasses this idea, as it reflects whether the system is responsive enough to meet the operational needs without delays.

While quality would refer to the accuracy and effectiveness of the responses, and readiness would relate to the system's capacity to respond when needed, these attributes do not directly address the frequency aspect. Quantity could imply a measure of how much is produced or available but does not specifically focus on the timing of those outputs. Thus, the most appropriate performance attribute for assessing the frequency of responses is indeed timeliness.