The injuries and diseases caused by poorly designed or unsuitable workstations and work methods often develop slowly over a period of months or years. However, a worker will usually have some signs and symptoms for a long period
of time indicating that something is wrong. For example, the worker may be uncomfortable while doing her job, or feel aches in the muscles or joints after going home from work. Additionally,she may have many minor muscle strains over a
period of time. It is important to investigate these kinds of problems because what may begin as discomfort may lead in some cases to serious disabling injury or musculoskeletal disorder