The SISP notion has experienced an evolution (Lederer & Sethi, 1998). Rapid business and IT change
have been recognized as the main drivers for SISP (Newkirk, et al., 2008). Those changes within
recognition of IT as a strategic resource have caused an SISP evolution. Figure 3 depicts the SISP
evolution in four stages; each is the result of IT changing nature and its position as a strategic resource for
the firms.