[IEEE 2017 4th International Conference on Information Technology, Computer, and Electrical Engineering (ICITACEE) - Semarang, Indonesia (2017.10.18-2017.10.19)] 2017 4th International Conference on Information Technology, Computer, and Electrical Engineering (ICITACEE) - Design of pokayoke systems to increase the efficiency of function check oxygen sensor machine using programmable logic controller in manufacturing industry