“…Mak (1982), Wee (1993), Wee (1998), Chung, Liu, and Tsai (1997), Abad (2000), Yang and Wee (2000), Rau, Wu, and Wee (2003), Yang (2004a), Dye, Ouyang, and Hsieh (2007), Ouyang, Teng, Goyal, and Yang (2009), Yang, Wee, Chung, and Ho (2010) consider constant rate of demand in their studies. Bhunia and Maiti (1998), Chung and Tsai (2001), Moon, Giri, and Ko (2005), Yang (2005) and Lee and Hsu (2009) assume the demand to be a time-dependent function. Examples for time-dependent demand applications can be seen in grocery retailing industry that some products' demand rate varies in different weekdays.…”