American Express's "Service Tracking Report" systematically measures both customer satisfaction and employee performance worldwide. Compiled on a monthly basis, the document uses statistics to measure the performance of business units throughout the world against more than $100$ service quality factors related to their customers' three major service dimensions$-$responsiveness, timeliness and accuracy. American Express's "Service Tracking Report" is a$($n$)$:

Group of answer choices

Service performance index

Customer service indicator

Internal$-$external service control benchmark

Quality improvement measure

Total quality management assessment