Abstract
Abstract The research strives to determine the rate of contribution percentage of mistakes – proof devices in the achievement zero defects. Therefore, the organization management and employees can be attracted to the importance to these simple devices in reduction percent of products defective and the quality of cost considerably. The problem of research included that “non found devices and fixtures simple installed on machines and equipments allow to passing the more from mechanical and human errors and then arise products defects. The research relied to collect the data and information needed in questionnaire as main tool for making that, and then computerized analysis to the data and come up with results and conclusions. Finally, the researcher put a set of beneficial suggestions for organization under search. .
