acceptable reliability

Acceptable Risks: Politics, Policy, and Risky Technologies
$75.00
Complex and risky technologies--technologies such as new drugs for the treatment of AIDS that promise great benefits to our society but carry significant risks--pose many problems for political leaders and the policy makers responsible for overseeing them. Public agencies such as the Food and Drug Administration are told by political superiors not to inhibit important technological advances and may even be charged with promoting such development but must also make sure that no major accidents occur under their watch. Given the large costs associated with catastrophic accidents, the general public and elected officials often demand reliable or failure-free management of these technologies and have little tolerance for the error.
Research in this area has lead to a schism between those who argue that it is possible to have reliable management techniques and safely manage complex technologies and others who contend that such control is difficult at best. In this book C. F. Larry Heimann advances an important solution to this problem by developing a general theory of organizational reliability and agency decision making. The book looks at both external and internal influences on reliability in agency decision making. It then tests theoretical propositions developed in a comparative case study of two agencies involved with the handling of risky technologies: NASA and the manned space flight program and the FDA's handling of pharmaceuticals--particularly new AIDS therapies.
Drawing on concepts from engineering, organizational theory, political science, and decision theory, this book will be of interest to those interested in science and technology policy, bureaucratic management and reform, as well as those interested in health and space policy.
C. F. Larry Heimann is Assistant Professor of Political Science, Michigan State University.

Risk-based maintenance of ethylene oxide production facilities [An article from: Journal of Hazardous Materials]
$8.95
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
This paper discusses a methodology for the design of an optimum inspection and maintenance program. The methodology, called risk-based maintenance (RBM) is based on integrating a reliability approach and a risk assessment strategy to obtain an optimum maintenance schedule. First, the likely equipment failure scenarios are formulated. Out of many likely failure scenarios, the ones, which are most probable, are subjected to a detailed study. Detailed consequence analysis is done for the selected scenarios. Subsequently, these failure scenarios are subjected to a fault tree analysis to determine their probabilities. Finally, risk is computed by combining the results of the consequence and the probability analyses. The calculated risk is compared against known acceptable criteria. The frequencies of the maintenance tasks are obtained by minimizing the estimated risk. A case study involving an ethylene oxide production facility is presented. Out of the five most hazardous units considered, the pipeline used for the transportation of the ethylene is found to have the highest risk. Using available failure data and a lognormal reliability distribution function human health risk factors are calculated. Both societal risk factors and individual risk factors exceeded the acceptable risk criteria. To determine an optimal maintenance interval, a reverse fault tree analysis was used. The maintenance interval was determined such that the original high risk is brought down to an acceptable level. A sensitivity analysis is also undertaken to study the impact of changing the distribution of the reliability model as well as the error in the distribution parameters on the maintenance interval.