JENS RASMUSSEN was a research professor of cognitive systems engineering at Ris National Laboratory and the Technical University of Copenhagen, following 25 years as the head of the Electronics Department at Ris National Laboratory. Since 1962, he has conducted research in the areas of reliability and risk factors, human reliability, work domain taxonomy, human-machine interaction, and ecological information systems design. A distinguished leader in these fields, he has chaired a number of groups of international experts appointed to assess risk and human-machine interaction in nuclear and other hazardous industries. He is now a consultant in cognitive systems engineering and risk management.

• 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 ANDDECISION MAKING. Cooperative Work: A Conceptual Framework (K. Schmidt). SPECIAL PROBLEMS IN MODELING DECISION MAKING IN SOCIALSYSTEMS. 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 andFeedback 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.