One of the Department of Energy's operating goals is to enusre the safetly of its over 100,000 workers. To that end, the Department has developed a number of measures to identify trends and patters in occupational injuries and illnesses and to gauge overall safety performance. Each quarter, the Office of Environment, Safety and Health reports Departmental trend information (including the National Nuclear Security Administration) using a number of widely recognized occupational safety performance indicators such as total recordable case rate and the lost workday case rate. These mesausres track work-related injuries and illnesses that require days away from work, restricted work activity, or medical treatement beyond first aid. The general guidelines relative to recordable cases are established by the Occupational Safety and Health Administration.