The search for ever greater levels of productivity is due in general to manâ€(tm)s natural tendency to minimize the amount of labour needed to produce the goods useful for maximizing the satisfaction of his needs for survival and progress. Labour in effect represents a necessary but...

Since the production has been found to be an economical means for satisfying human wants, this process requires a complex industrial organization together with a large investment in equipments, plants and productive systems. These productive systems are employed to alter the physical environment...