Whether to use job descriptions usually depends upon a number of factors, including employer preferences and resources. Employers should look at relevant rules and regulations, the size and type of organization and industry, hiring practices, and current employees.
A job description is an internal document that clearly states the essential job requirements, job duties, responsibilities, and skills required to perform a specific role. A more detailed job description will cover how success is measured in the role so it can be used during performance evaluations. They are also known as a job specification, JD, and position description (job PD).