Which of the following is an example of a measurable result of using a customer service application?

A measurable result of using a customer service application is demonstrated in the choice that indicates a decrease in average call duration by 5 minutes. This outcome is quantifiable, meaning it can be tracked and assessed using specific metrics. Reducing call duration is a clear indicator of improved efficiency in customer service operations, suggesting that the application helps streamline processes, enabling representatives to resolve issues more quickly.

In contrast, the other options do not provide concrete metrics that can be measured effectively. For example, a decrease in support calls over six months is vague and does not specify a direct benefit or confirm the effectiveness of the application. Recording maintenance by customer service does not imply measurable results; it describes a functionality rather than an impact. Similarly, stating that every registered vehicle will have an up-to-date maintenance history is an aspiration or goal rather than a measurable result. The focus on quantifiable data in customer service applications highlights the importance of assessing efficiency and performance through specific metrics, which is effectively illustrated in the choice regarding call duration.