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Related Concept Videos

Uncertainty: Overview00:59

Uncertainty: Overview

In analytical chemistry, we often perform repetitive measurements to detect and minimize inaccuracies caused by both determinate and indeterminate errors. Despite the cares we take, the presence of random errors means that repeated measurements almost never have exactly the same magnitude. The collective difference between these measurements - observed values - and the estimated or expected value is called uncertainty. Uncertainty is conventionally written after the estimated or expected value.
Design Consideration01:22

Design Consideration

Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key aspect...
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Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
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Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
Hazard Rate01:11

Hazard Rate

The hazard rate, also known as the hazard function or failure rate, is a statistical measure used to describe the instantaneous rate at which an event occurs, given that the event has not yet happened. From a probabilistic perspective, it represents the likelihood that a subject will experience the event in a very small time interval, conditional on surviving up to the beginning of that interval. In terms of frequency, the hazard rate can be viewed as the ratio of the number of events to the...
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Related Experiment Video

Updated: Jul 11, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
09:18

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

Risk and uncertainty analysis in government safety decisions.

Elisabeth Paté-Cornell1

  • 1Department of Industrial Engineering and Engineering Management, Stanford University, CA 94305-4024, USA. mep@leland.stanford.edu

Risk Analysis : an Official Publication of the Society for Risk Analysis
|June 29, 2002
PubMed
Summary
This summary is machine-generated.

Probabilistic risk analysis (PRA) effectively assesses risks and uncertainties for safety policy. This study explores handling uncertainties and conservatism in risk ranking for decision-making.

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An R-Based Landscape Validation of a Competing Risk Model
05:37

An R-Based Landscape Validation of a Competing Risk Model

Published on: September 16, 2022

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Last Updated: Jul 11, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
09:18

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

An R-Based Landscape Validation of a Competing Risk Model
05:37

An R-Based Landscape Validation of a Competing Risk Model

Published on: September 16, 2022

Area of Science:

  • Systems analysis
  • Bayesian probability
  • Risk management

Background:

  • Probabilistic risk analysis (PRA) is a valuable tool for risk and uncertainty assessment.
  • PRA aids in prioritizing safety policy options across diverse applications.
  • Public sector risk quantification involves multiple stakeholders and complexities.

Purpose of the Study:

  • To describe approaches for treating uncertainties in risk analysis.
  • To examine the implications of uncertainty treatment for risk ranking.
  • To discuss the role of PRA in safety decision-making processes.

Main Methods:

  • Systems analysis and Bayesian probability form the foundation of PRA.
  • Case studies include space shuttle tile maintenance, anesthesia patient risk, and seismic building codes.
  • Analysis of uncertainty treatments and levels of conservatism.

Main Results:

  • Different approaches to uncertainty significantly impact risk ranking.
  • The adoption of conservative hypotheses influences conditional uncertainty analysis.
  • Varying levels of conservatism affect the prioritization of risk mitigation measures.

Conclusions:

  • PRA provides a robust framework for evaluating risks and informing safety policies.
  • Understanding and managing uncertainty is crucial for accurate risk assessment and decision-making.
  • The degree of conservatism applied in PRA has direct implications for risk mitigation strategies.