The additional factors are the serious lack of awareness and attention amongst management and
supervisory staff concerning the utilization of materials and equipment, and inaccurate scheduling,
accounting, packaging, delivery and improper storage of materials. A significant portion of waste is
caused by problems which occur in stages that precede production, such as inadequate design, lack of
planning, and flaws in the material supply system (Soibelman, 1993). As Skoyles (1976) asserts, most
causes of waste are related to flaws in the management system, and have very little to do with the lack of
qualification and motivation of workers.