1. Technology Research Center, Cebu Technological University, Corner M.J. Cuenco Ave. & R. Palma St., Cebu City, 6000 Philippines
2. Department of Industrial Engineering, Cebu Technological University, Corner M.J. Cuenco Ave. & R. Palma St., Cebu City, 6000 Philippines
3. Graduate School, Cebu Technological University, Corner M.J. Cuenco Ave. & R. Palma St., Cebu City, 6000 Philippines