Title I Technical Assistance Manual

a. The employer's judgment

An employer's judgment as to which functions are essential is important evidence. However, the legislative history of the ADA indicates that Congress did not intend that this should be the only evidence, or that it should be the prevailing evidence. Rather, the employer's judgment is a factor to be considered along with other relevant evidence.

However, the consideration of various kinds of evidence to determine which functions are essential does not mean that an employer will be second-guessed on production standards, setting the quality or quantity of work that must be performed by a person holding a job, or be required to set lower standards for the job.

For example: If an employer requires its typists to be able to accurately type 75 words per minute, the employer is not required to show that such speed and accuracy are "essential" to a job or that less accuracy or speed would not be adequate. Similarly, if a hotel requires its housekeepers to thoroughly clean 16 rooms per day, it does not have to justify this standard as "essential." However, in each case, if a person with a disability is disqualified by such a standard, the employer should be prepared to show that it does in fact require employees to perform at this level, that these are not merely paper requirements and that the standard was not established for a discriminatory reason.