It is also important to understand the ambiguous nature of productivity. There exist a few types of productivity as well as different hierarchical levels where productivity can
be discussed within. Almost any process in an enterprise is fed with several types of input (e.g.labour, capital, material and energy) and has more than one output (e.g. product A, product B). We must be able to separate partial productivity (output related to one type of input) from total productivity (output related to multiple types of input). Considering existing hierarchical levels, it is not difficult to comprehend that the strategical perspective management towards productivity will differ from operational view of productivity among operators (Tangen, 2005).