Production management 39 Environmental aspects 20 Waste minimization 9 Research 6 Statistical methods 6 Management 5 Manufacturing industries 5 Business logistics 4 Manufacturing processes 4 Energy consumption 3 Product management 3 Production engineering 3 Assembly-line methods 2 Business enterprises 2 Case studies 2 Construction industry 2 Data processing 2 Energy conservation 2 Environmental auditing 2 Environmental management 2 Palm oil industry 2 Quality control 2 Refuse and refuse disposal 2 Small business 2 Academic libraries 1 Amines 1 Automation 1 Automobile industry and trade 1 Automobile repair shops 1 Ballasts (Electricity) 1