Calibration Period is a limited time process where a new task, group of tasks, or process is performed in a controlled environment with the goal of measuring resources, workforce needed for the execution of the task in a long term engagement, and the quality range expected from its output. It is normally performed in the context of the elaboration of a service level agreement (SLA) between a vendor and a client, with the purpose of determining pricing, scope, duration, and resources allocated to a project or service. One of the standard outputs of a Calibration Period is the average handle time (AHT) of a specific task, which is the average time, usually in seconds, taken by a trained specialist to perform the task.