Partial table of contents: INTRODUCTION: AN OVERVIEW OF THE FIELD. Distributed Decision Making: Some Notes on the Literature (B. Brehmer). APPROACHES TO MODELING THE ORGANIZATION OF COOPERATIVE WORK AND DECISION MAKING. Cooperative Work: A Conceptual Framework (K. Schmidt). SPECIAL PROBLEMS IN MODELING DECISION MAKING IN SOCIAL SYSTEMS. Responsibility Allocation in Modern Technology (F. Rapp). FIELD STUDIES OF COOPERATIVE WORK. A Method for Tactical Reasoning (MTR) in Emergency Management: Analysis of Individual Acquisition and Collective Implementation (R. Samurcay & J. Rogalski). EXPERIMENTAL STUDIES IN SIMULATED TASK ENVIRONMENTS. Dynamic Decision Making: The Effects of Task Complexity and Feedback Delay (B. Brehmer & R. Allard). SIMULATION OF DECISION PROCESSES. Decision Models and the Design of Knowledge-Based Systems (M. Lind). METHODOLOGICAL CONCLUSION. Use of Simulation in the Study of Complex Decision Making (B. Brehmer, et al.). Author Index. Subject Index.