However, with the complicated interactions among the players, the network structure fits neither "market" nor "hierarchy" categories (Powell, 1990). It is not clear what kind of performance impacts different supply network structures could have on firms, and little is known about the coordination conditions trade-offs that may exist among the players.From a system's point of view, a complex network structure can be decomposed into individual component firms (Zhang and Dilts, 2004). Traditionally, companies in a supply network concentrate on the inputs and outputs of the processes, with little concern for the internal management working of other individual players. Therefore, the choice of internal management control structure is known to impact local firm performance (Mintzberg, 1979). In the 21st century, there have been few changes in business environment that contributed to the development of supply chain networks.
1996); reducing contamination is affected by the however, levels of up to 5% are also used type of acid, its concentration, the tempera- even post-chilling. ture and duration of application, the type of Organic acid treatments are more effec- microorganism and level of contamination, tive against low- compared with high- the coverage of the carcass surface with the contamination levels (Greer and Dilts 1992; solution, the carcass surface region, the type Cutter et al. 1997). The target organisms and of tissue (e.g., lean or adipose, frozen or meat tissue also affect microbial reductions fresh tissues), and the stage of application caused by organic acids. For instance, P. (Anderson et al. 1988; Anderson and Marshall fluorescens was less resistant to lactic, acetic, 1989; Cutter and Siragusa 1994b; Hardin et and citric spray rinses than E. coli (Cutter and al
annaabi.ee 
