The cumulative physical stress of job-related tasks, such as repetitive motion injuries, has made ergonomics an important workplace issue for the construction industry in the 1990s. Ergonomics is the science of tailoring work and workplace to the physical needs of the worker. In the construction industry, such maladies as carpal tunnel syndrome, back pain, and "vibration white fingers" have alarmed safety officials. To help employers deal with repetitive motion injuries, the Occupational Safety and Health Administration (OSHA) issued voluntary guidelines. If the voluntary guidelines become accepted by most industries, they may evolve into a federal safety law.