Some studies (Chang et al., 2003; Chong, 1996; Chong and Eggleton, 2003; Mia
and Chenhall, 1994) have focused on the importance of task characteristics and Management accounting system design on managerial performance. For example, Mia and Chenhall (1994) suggested that differentiation of activities into areas such as marketing and production is an organizational response to manage uncertainty. They found that the association between the extent ofmanagers’ use of broad scope information and performance was stronger for managers of marketing than production activities. Moreover, Chong (1996) found that under a high task uncertainty situation, the extent of use of broad scope information led to effective managerial decisions and improved managerial performance. In contrast, under low task uncertainty situations, the extent of use of broad scope information led to information overload which was dysfunctional to managerial performance. Furthermore, Chong and Eggleton (2003) argued that, under high task uncertainty situations, it would be appropriate for managers to utilize more broad scope information to cope with the complexities of the decision-making environment. The use of more broad scope information would help to reduce task uncertainty, thereby enhancing decision quality, which in turn, should improve their performance. Conversely for all these results, in a developing country context, Soobaroyen and Poorundersing (2008) found non-significant intervening effect for Management accounting system between task uncertainty and managerial performance (except that there is a significant but negative relationship between task uncertainty and aggregated Management accounting system information).