Quality control Statistical methods 522 Production management 509 Total quality management 303 Management 276 Six sigma (Quality control standard) 265 Process control 242 Standards 214 Electric power systems 193 Computer software 188 Electric power system stability 152 Quality assurance 152 Reliability (Engineering) 124 Customer services 101 Quality of products 76 Consumer satisfaction 71 Data processing 71 Design and construction 62 ISO 9000 Series Standards 62 Testing 62 Computer networks 60 Food industry and trade 60 Manufacturing processes 59 Reliability 59 Quality function deployment 57 Experimental design 56 Industrial management 54 Organizational effectiveness 52 Building 49 Evaluation 46