ABSTRACT
Hyvrinen & Krki 1996). Additional training over-
head is required for each new system or system
update (Agarwal et al. 1996). In conjunction with
traditional procurement policy it is conceivable that
numerous systems can appear on one site (Ahern
2006), for example (Cylon 2009, Honeywell 2009,
Siemens 2009). Hatley et al. (2005) states that in the
absence of compatible hardware and communica-
tion protocols maintenance can become extremely
problematic as seamlessly integrating these systems
is an inefficient overhead.