sentences:  The systems are based on the assumption that all manual tasks can be analysed into basic motions of the body or body members.They were compiled as a result of a very large number of studies of each movement, generally by a frame-by-frame analysis of films of a wide range of subjects, men and women, performing a wide variety of tasks.The first generation of PMT systems, MTM1, were very finely detailed, involving much analysis and producing extremely accurate results.