“…The ISF is "an integral part of achieving organizational success" (and may be defined as) "all IS groups and departments within the organization" (Chang and King, 2005, p.86). Whether distributed or centralised, the ISF is expected to provide various support services to end-users in a cost-and time-effective manner, across a variety of different packages and configurations, covering issues such as data backup and recovery, hardware and software maintenance, upgrades and installation (Jiang et al, 2002;Shaw et al, 2002). Assessing ISF's performance has long been an important issue to IS executives (Carlson and McNurlin, 1992;Saunders and Jones, 1992) that has remained prominent in IS studies (e.g.…”