Timely rate of document processing (rate of completion within specified time)
Text error rate (control in a lower range, the important text is even lower! )
Work task completion index (explain work task completion index)
Attendance status
Service awareness, attitude-give a rough score and see if there are any incongruities.
The rest depends on the job content of this position. The above are the assessment indicators of general clerks, because many company clerks have different job contents, so it is impossible to be so comprehensive. Please refer to it.