What two things do many employers use to judge an employee's performance?

Key Performance Indicators achievement, time management and attire to learn and development. 

The punctuality of the employee i.e. the time management to perform the specific task.

The art or the manner in which the employee perform his task.

1. Time management.

 2.Multi-tasking capabilities.

development

multiti task

communication skills

There are several criteria to judge an employee’s performance. In order of importance, I would recommend the following two criteria:

Communication: If the employee has good verbal and written communication skills, listening skills a lot of problems could be solved quickly.

 Working with People: An employee must be team player. Without team work no project could be a success.

1. Attitude
2. Aptitude to learning

i fully agree with the answers been added by experts.....Thanks.

I agree with the rest answer

Efficiency and Time Management 

it used to be tardiness and quality of work, but now most employees can work from their cellphones so it is not really important to be in an office to finish a task. 

1. Results 2. Cooperation with co-workers