Zur Rolle versunkener Kosten in aufeinander folgenden IT-Outsourcing-Entscheidungen

Despite the ongoing theoretical and practical investigations of IT outsourcing, there are still a large number of projects that are unsuccessful or even fail all along the line. Studies in the decision-making literature indicate that psychological effects in the evaluation of decision-relevant facts may be one relevant reason for unsuccessful decisions. By conducting a quantitative empirical study with German IT decision makers, we investigate the influence of non-rational factors within consecutive IT outsourcing decisions. We show that beside the rational economic factors (transaction, production and the rational part of switching costs) also non-rational switching costs in terms of sunk cost do significantly contribute to the explanation of consecutive IT outsourcing decisions. Furthermore, we examine moderating effects that affect the non-rational behavior of IT decision makers. Besides the theoretical contribution to analyze the effects of sunk cost on both an individual and organizational level, we also derive practical implications. In consecutive IT outsourcing decisions, the non-rational behavior triggered by sunk cost can for example be reduced by replacing the decision maker or consult a decision team when sunk cost play a considerable role.