service level

noun1

1. •
   A measure of how well a service is delivered, as a percentage of service interactions that meet a specified criterion of success and efficiency.

   • Based on a monthly average, a service level of 99% IP backbone available and capable of forwarding IP packets 99.0% of the time. The service level extends to other ISPs' services used by Cleardazeᵀᴹ. — 2016