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  2. Hazard ratio - Wikipedia

    en.wikipedia.org/wiki/Hazard_ratio

    In survival analysis, the hazard ratio (HR) is the ratio of the hazard rates corresponding to the conditions characterised by two distinct levels of a treatment variable of interest. For example, in a clinical study of a drug, the treated population may die at twice the rate of the control population.

  3. ARP4761 - Wikipedia

    en.wikipedia.org/wiki/ARP4761

    The Particular Risk Analysis (PRA) looks for external events which can create a hazard such as a birdstrike or engine turbine burst. The Zonal Safety Analysis (ZSA) looks at each compartment on the aircraft and looks for hazards that can affect every component in that compartment, such as loss of cooling air or a fluid line bursting.

  4. Cyber PHA - Wikipedia

    en.wikipedia.org/wiki/Cyber_PHA

    A worksheet is commonly used to document the cyber PHA/HAZOP assessment. Various spreadsheet templates, databases and commercial software tools have been developed to support the cyber method. The organization's risk matrix is typically integrated directly into the worksheet to facilitate assessment of severity and likelihood and to look up the ...

  5. Proportional hazards model - Wikipedia

    en.wikipedia.org/wiki/Proportional_hazards_model

    There is implicitly a ratio of hazards here, comparing company i's hazard to an imaginary baseline company with 0 P/E. However, as explained above, a P/E of 0 is impossible in this application, so ⁡ is meaningless in this example. Ratios between plausible hazards are meaningful, however.

  6. Discrete-time proportional hazards - Wikipedia

    en.wikipedia.org/wiki/Discrete-time_proportional...

    This approach performs well for certain measures and can approximate arbitrary hazard functions relatively well, while not imposing stringent computational requirements. [5] When the covariates are omitted from the analysis, the maximum likelihood boils down to the Kaplan-Meier estimator of the survivor function. [6]

  7. Process hazard analysis - Wikipedia

    en.wikipedia.org/wiki/Process_Hazard_Analysis

    A simple element of risk quantification is often introduced in the form of a risk matrix, as in preliminary hazard analysis (PreHA). The selection of the methodology to be used depends on a number of factors, including the complexity of the process, the length of time a process has been in operation and if a PHA has been conducted on the ...

  8. Category:Hazard analysis - Wikipedia

    en.wikipedia.org/wiki/Category:Hazard_analysis

    Download as PDF; Printable version; In other projects Wikidata item; ... Pages in category "Hazard analysis" The following 22 pages are in this category, out of 22 ...

  9. Nelson–Aalen estimator - Wikipedia

    en.wikipedia.org/wiki/Nelson–Aalen_estimator

    The Nelson–Aalen estimator is a non-parametric estimator of the cumulative hazard rate function in case of censored data or incomplete data. [1] It is used in survival theory, reliability engineering and life insurance to estimate the cumulative number of expected events. An "event" can be the failure of a non-repairable component, the death ...

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