In recent years public attention has focused on an array of
low-probability/high-consequence (LC/HC) events that pose a signif-
icant threat to human health, safety, and the environment. At the same
time, public and private sector responsibilities for the assessment and
management of such events have grown because of a perceived need to
anticipate, prevent, or reduce the risks. In attempting to meet these
responsibilities, legislative, judicial, regulatory, and private sector
institutions have had to deal with the extraordinarily complex problem
of assessing and balancing LP/ HC risks against the costs and ben if its
of risk reduction. The need to help society cope with LP/HC events such
as nuclear power plant accidents, toxic spills, chemical plant
explosions, and transportation accidents has given rise to the
development of a new intellectual endeavor: LP/HC risk analysis. The
scope and complexity of these analyses require a high degree of
cooperative effort on the part of specialists from many f elds.
Analyzing technical, social, and value issues requires the efforts of
physicists, biologists, geneticists, statisticians, chemists, engineers,
political scientists, sociologists, decision analysts, management
scientists, economists, psychologists, ethicists, lawyers, and policy
analysts. Included in this volume are papers by authors in each of these
disciplines. The papers share in common a focus on one or more of the
following questions that are generic to the analysis of LP/HC risks.