{"id":4285,"date":"2023-09-04T11:03:19","date_gmt":"2023-09-04T08:03:19","guid":{"rendered":"https:\/\/fire-techinfo.com\/?p=4285"},"modified":"2023-09-04T11:07:34","modified_gmt":"2023-09-04T08:07:34","slug":"fire-risk-assessment-in-buildings-qualitative-and-quantitative-methods","status":"publish","type":"post","link":"https:\/\/fire-techinfo.com\/en\/fire-risk-assessment-in-buildings-qualitative-and-quantitative-methods\/","title":{"rendered":"Fire risk assessment in buildings &#8211; qualitative and quantitative methods"},"content":{"rendered":"<p>&nbsp;<\/p>\n<blockquote><p><em>With this article continue the series of articles dedicated to fire risk assessment in buildings. [1] [2]<\/em><\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4155\" src=\"https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-0.png\" alt=\"\" width=\"1000\" height=\"610\" srcset=\"https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-0.png 1000w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-0-300x183.png 300w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-0-768x468.png 768w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-0-24x15.png 24w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-0-36x22.png 36w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-0-48x29.png 48w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>In order to prepare a fire risk assessment, all data generated during the frequency and consequences analysis fire scenarios are combined and analysed. This can be achieved in a variety of ways, including qualitative, semi-quantitative and quantitative methods.<\/p>\n<p style=\"text-align: center;\"><span style=\"color: #ff7700;\"><strong><br \/>\nQualitative and quantitative methods for fire risk estimation, risk matrices<\/strong><\/span><\/p>\n<p>The qualitative approach addresses both frequency and consequences and includes methods such as risk matrix, risk indices, and risk clustering. Examples are shown in Tables 1 and 2 and Figure 2.<\/p>\n<figure id=\"attachment_4295\" aria-describedby=\"caption-attachment-4295\" style=\"width: 740px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4295\" title=\"Table 1: Criteria for classifying possible consequences. Source: \u00a9 SFPE\" src=\"https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.1-en.png\" alt=\"Table 1: Criteria for classifying possible consequences. Source: \u00a9 SFPE\" width=\"740\" height=\"316\" srcset=\"https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.1-en.png 1000w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.1-en-300x128.png 300w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.1-en-768x328.png 768w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.1-en-24x10.png 24w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.1-en-36x15.png 36w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.1-en-48x20.png 48w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><figcaption id=\"caption-attachment-4295\" class=\"wp-caption-text\"><em>Table 1: Criteria for classifying possible consequences. Source: \u00a9 SFPE<\/em><\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_4297\" aria-describedby=\"caption-attachment-4297\" style=\"width: 740px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4297\" title=\"Table 2: Example of frequency criteria used to classify probability. Source: \u00a9 SFPE\" src=\"https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.2-en.png\" alt=\"Table 2: Example of frequency criteria used to classify probability. Source: \u00a9 SFPE\" width=\"740\" height=\"393\" srcset=\"https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.2-en.png 911w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.2-en-300x159.png 300w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.2-en-768x408.png 768w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.2-en-24x13.png 24w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.2-en-36x19.png 36w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-Tabl.2-en-48x26.png 48w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><figcaption id=\"caption-attachment-4297\" class=\"wp-caption-text\"><em>Table 2: Example of frequency criteria used to classify probability. Source: \u00a9 SFPE<\/em><\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_4300\" aria-describedby=\"caption-attachment-4300\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4300\" title=\"Figure 2: Classification of consequences and frequency, risk matrix. Source: \u00a9 SFPE\" src=\"https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-2-en.png\" alt=\"Figure 2: Classification of consequences and frequency, risk matrix. Source: \u00a9 SFPE\" width=\"600\" height=\"689\" srcset=\"https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-2-en.png 896w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-2-en-261x300.png 261w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-2-en-892x1024.png 892w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-2-en-768x882.png 768w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-2-en-21x24.png 21w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-2-en-31x36.png 31w, https:\/\/fire-techinfo.com\/wp-content\/uploads\/2023\/07\/Fire-Risk-Assessment-2-en-42x48.png 42w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption id=\"caption-attachment-4300\" class=\"wp-caption-text\"><em>Figure 2: Classification of consequences and frequency, risk matrix. Source: \u00a9 SFPE<\/em><\/figcaption><\/figure>\n<p>Semi-quantitative methods combine quantitative and qualitative tools. Semi-quantitative methods use sources such as actuarial data, which provide data for quantitative frequency analysis, but qualitative analysis of consequences. Other methods use fire effects modelling for quantitative consequence analysis, but treat frequency analysis qualitatively. These approaches can be used with an event tree or other analytical methods. The event tree method is often used to analyse complex situations with several possible scenarios where several fire or safety systems are in place or are being considered. Event trees are developed for a scenario with frequencies and consequences already described, and then the risk is calculated.<\/p>\n<p>One method of quantifying the fire risk from multiple fire scenarios is shown below:<\/p>\n<p style=\"text-align: left; padding-left: 40px;\">\u03a3 Ri = \u03a3 Li x Fi<br \/>\nwhere<br \/>\nRi = Risk associated with a scenario i<br \/>\nLi = Loss associated with a scenario i<br \/>\nFi = Frequency occurrence of scenario i<\/p>\n<p>The last type of risk assessment tool is the benefit-cost approach, which can determine the costs required to achieve different levels of risk reduction or determine the optimal levels of fire protection based on expected losses. These approaches are often used in the insurance industry and by facility managers to balance acceptance, mitigation, transfer or avoidance decisions in risk management. The result is often expressed as expected losses or costs, which include capital costs, maintenance costs and expected losses.<\/p>\n<p style=\"text-align: right;\"><strong><em>Follow the other articles on this topic!<\/em><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"padding-left: 40px;\">References:<br \/>\n[1] http:\/\/fire-techinfo.com &#8211; Fire risk assessment in buildings \u2013 a general overview<br \/>\n[2] http:\/\/fire-techinfo.com &#8211; Fire risk assessment in buildings \u2013 identification and analysis of hazards, events and scenarios<br \/>\n[3] http:\/\/sfpe.org &#8211; \u0410n \u043everview of \u0430pproaches and resources for building fire risk assessment<br \/>\n[4] SFPE Engineering Guide \u2013 Fire Risk Assessment, Society of Fire Protection Engineers<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; With this article continue the series of articles dedicated to fire risk assessment in buildings. [1] [2] &nbsp; In order to prepare a fire risk assessment, all data generated during the frequency and consequences analysis fire scenarios are combined and analysed. This can be achieved in a variety of ways, including qualitative, semi-quantitative and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4156,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[50,46,51],"tags":[73,71,163],"class_list":["post-4285","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-applications","category-bulgaria","category-world","tag-fire-hazard","tag-fire-risk","tag-fire-risk-assessment","eq-blocks"],"acf":{"top_banner":"","middle_center":"","right_small":"","banner_right1":"","banner_right2":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fire risk assessment in buildings - qualitative and quantitative methods<\/title>\n<meta name=\"description\" content=\"In order to prepare a fire risk assessment, all data generated during the frequency and consequences analysis fire scenarios are combined and analysed. 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