The increasing importance of the strategic role of information systems (IS) in a world of global markets, exemplified by the trend to international e-commerce, has placed even greater emphasis on the need for effective IS strategic planning (ISSP). A first step in empirically determining the effectiveness of a particular ISSP project is to establish how ISSP success (the dependent variable) is to be defined and operationalised. Various approaches have been discussed in the IS literature. This study contributes to that discussion by undertaking a review of that literature and proposing a four-part approach for operationalising the dependent variable, ISSP success.