An FCE can be used to determine fitness to work following an extended period of medical leave. If an employee is unable to return to work, the FCE provides information on prognosis, and occupational rehabilitation measures that may be possible. An FCE can also be used to help identify changes to employee workload, or modifications to working conditions such as ergonomic measures, that the employer may be able to undertake in an effort to accommodate an employee with a disability or medical condition. FCEs are needed to determine if an employee is able to resume working in a capacity "commensurate with his or her skills or abilities"[2] before the disability or medical condition was diagnosed. An FCE involves assessments made by one or more medical doctors. There are two types of FCE used by the United States Social Security Administration: the Mental Functional Capacity Evaluation (MFCE) that measures emotional and mental capacity, and the Physical Functional Capacity Evaluation (PFCE) that measures physical functioning.[2]
Studies have been undertaken to assess the accuracy of FCEs in predicting the longterm outcomes for patients, both in terms of returning to work, and in probability of permanent disability. Questions that have been raised include how to identify medical and societal variables in predicting disability.[3]
FCEs may be required by law for some employers before an employee can return to work, as well as by insurers before insurance payments can be made. FCEs are also used to determine eligibility for disability insurance, or pension eligibility in the event that an employee is permanently unable to return to work. The United States Social Security Administration has its own FCE, called the Assessment of Disability. A newer FCE model is the World Health Organization's International Classification of Functioning, Disability and Health.