Okunade, O. S.Ogueji, K. J.2023-07-192023-07-192020978-078-515-9ui_inbk_okunade_integer_2020In: Oluleye, A. E, Oladokun, V. O., and Akanbi, O. G. (eds.) Advancing Industrial Engineering in Nigeria through Teaching, Research and Innovation: A book of reading, pp. 123-170http://ir.library.ui.edu.ng/handle/123456789/8395enBook chapter