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The traditional approach to assess information system (IS) project success is adherence to planning (ATP) – meeting budget, schedule, and requirements targets. Today, scholars agree that ATP is insufficient to adequately assess IS project success, but an agreed-on set of success criteria is still missing. Many works on this topic are based on theoretical considerations rather than empirical inquiries. We analyze practitioners’ subjective perspectives by investigating what criteria IS project managers consider relevant for IS project success assessment. We interview eleven experienced project managers in Germany, applying Repertory Grid and Laddering to minimize potential biases. Our results yield eight success criteria, indicating that criteria like process efficiency and stakeholder satisfaction must be considered in addition to ATP. Scholars can use our findings to apply the identified success criteria in future studies. Practitioners gain insights into the expert perspective on project success and might rethink the way of assessing success in their projects.

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Despite extensive research over the past several decades, assessing information system (IS) project success is still a challenging endeavor. While the traditional approach takes process performance (time and budget) and product performance (functional and non-functional requirements) into account, the contemporary perspective acknowledges the more comprehensive character of project success and emphasizes the criticality of stakeholder satisfaction. Continuing previous research, we propose and test a model with customer satisfaction as the uppermost criterion of IS project success and process performance and product performance as its determinants. Following recent calls for researchers to investigate the explicit linkage between success factors and success criteria, we also analyze the influence of process transparency on process and product performance. We conducted a survey via a questionnaire with IS experts in Germany. We contribute to a deeper understanding of IS project success by indicating that customer satisfaction is less a matter of time and budget and that a stronger emphasis should be placed on product performance. Moreover, our results illuminate the role of process transparency in IS projects showing that it contributes to both process and product performance.

This study illuminates the role of client-vendor communication in relation to project performance and client satisfaction in information system projects. Results from a field study with managers on the client side suggest that both process and product performance positively influence the confirmation of expectations. However, process expectations do not -which might be due to the normality of budget and schedule overruns -whereas communication wields an important influence on client satisfaction. Future research should address the contribution of different communication mediums and contrast agile and non-agile projects.