IS-business integration capability: This capability is referring to the ability to produce a shared vision between IS and business in terms of enabling process integration and dynamic strategic alignment [22], [18], both IS and top managers’ involvement in firm’sstrategic planning [17], and IS-business consulting and mutual understanding [20]. As Hisham and Ariza [23]clarified, IS-business integration has a very strong effect on SISP success. By integrating IS and business, a mutual understanding and common vision will be provided between IS and businesses members and finally will result in SISP success. Therefore, the related hypothesis is as follow:H5a, b: “IS-business integration capability” has a strong positive relationship with (a) SISP objectives fulfilment and (b) SISP planning improvement.