An alternative key metric could be the "customer satisfaction score," commonly known as CSAT. This measurement offers direct insights from customers regarding their contentment with the service, encompassing timely deliveries, the safe arrival of packages, the professionalism of delivery staff, and effective resolution of issues. As a result, this single metric acts as a comprehensive gauge of service quality and may enhance repeat business and customer loyalty. Additionally, it can be viewed as a growth indicator, as satisfied customers are more inclined to recommend the service to others.