According to Torrington, a job description is usually developed by conducting a job analysis, which includes examining the tasks and sequences of tasks necessary to perform the job. The analysis considers the areas of knowledge and skills needed for the job. A job usually includes several roles. According to Hall, the job description might be broadened to form a person specification or may be known as "terms of reference". The person/job specification can be presented as a stand-alone document, but in practice it is usually included within the job description. A job description is often used by employers in the recruitment process.
According to the ADA, an employer may not ask disability-related questions and may not conduct medical examinations until after it makes a conditional job offer to the applicant (EEOC, 1995). An individual, as an applicant or a current employee, may wish to disclose that s/he has a disability and needs an accommodation, but is uncertain whether disclosure is possible or advisable. Including a brief and accurate statement in the job description about the employer’s responsibility and the individuals rights may help initiate the interactive process between an employer and an individual with a disability. If an individual is qualified to perform essential job functions except for limitations caused by a disability, the employer must consider whether the individual could perform these functions with a reasonable accommodation. An employer is not required to reallocate the essential functions of a job as a reasonable accommodation.