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Position Management
The duties listed in a position description are the functions and tasks assigned to the position.  The duties give a clear picture of what the employee must do in the position.  Duties not included in the position description are developmental, incidental, or temporary. 
Begin each duty statement with an action that describes the activity, whether physical or mental. Assure duty statements describe what the employee does, how the employee does the duty and for what purpose. List the percentage of time the duty is performed on average in a week.  Percentages generally do not go below 5%. Be specific and complete. Designate the duty as an essential or non-essential function.
The classification specifications give examples of duties typically performed by employees in the classification. 
Designating Essential Functions
The position description lists essential functions of the position. The essential functions are used to determine accommodation issues with the Americans with Disabilities Act (ADA) and return rights from Family and Medical Leave. 
A duty is considered an essential function if one of the following is true:
  • The position exists to perform the duty
  • There are a limited number of employees who can perform the duty
  • The duty is a highly specialized duty. 
An employee is required to perform all essential functions of the position with or without accommodation.  In the event an employee makes a request for accommodation, the position description is used to determine which duties can be modified or eliminated.  Duties marked essential functions are not eliminated.