Inhaltsangabe:Summary: This paper critically reviews approaches for the evaluation of investments in information systems prior to their implementation. First, the ground for the review is prepared by examining characteristics of evaluation, information systems and value. A classification of 54 evaluation approaches identified in English and German literature is then presented. Examples of each class are reviewed and their advantages and drawbacks are discussed. Their use in evaluation practice is analysed through the examination of empirical studies and directions for future research are given. A complete overview of state-of-the-art evaluation approaches is given at the end of the paper. Inhaltsverzeichnis:Table of Contents: 1.INTRODUCTION1 2.THEMATIC BACKGROUND3 2.1Information Systems3 2.2Evaluation8 2.3Value13 3.CRITICAL REVIEW OF EVALUATION APPROACHES17 3.1Antecedents to the Review17 3.2Effect-Assessing Approaches20 3.3Effect-Locating Approaches33 3.4Discussion of Usability of Approaches41 4.EVALUATION IN PRACTICE51 4.1Review of Empirical Studies51 4.2Interpretation of Empirical Studies55 4.3Discussion and Future Research57 5.CONCLUSIONS60 APPENDIX61 Overview of Evaluation Approaches61 Literature Search Strategy64 REFERENCES65