WRF report titled Asset Management Framework for Forested and Natural Assets<\/a>.<\/span><\/span><\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” sticky_enabled=”0″]<\/p>\n
Table 2. In-depth probability of failure ratings with descriptions.<\/h4>\n
This is a more detailed rating structure<\/span>. This structure is often suited to utilities who are further along in their asset management journey<\/span>. A more descriptive rating structure<\/span>\u00a0<\/span>helps to ensure that ratings are as objective as possible.<\/span><\/span>\u00a0<\/span><\/p>\n[\/et_pb_text][dvmd_table_maker tbl_row_header_count=”0″ tbl_responsive_break_by=”row” tbl_chead_cell_color=”#2ea3f2″ _builder_version=”4.16″ _module_preset=”default” tbl_chead_text_font=”|700|||||||” background_color=”#000000″ border_width_all=”2px” border_color_all=”RGBA(0,0,0,0)” locked=”off” global_colors_info=”{}” border_width_all__hover=”2px” border_width_all__hover_enabled=”on|hover” theme_builder_area=”post_content”][dvmd_table_maker_item col_label=”Condition Rating” col_content=”Rating
\n
1<\/center>
\n2<\/center>
\n3<\/center>
\n4<\/center>
\n5<\/center>” col_column_max_width=”0.5fr” col_chead_cell_color=”#2ea3f2 ” _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/dvmd_table_maker_item][dvmd_table_maker_item col_label=”Description” col_content=”Description
\nAsset is brand new or like new. Failure not anticipated within the foreseeable future.
\nAsset is not brand new but shows no more than cosmetic signs of wear and tear. Asset failure is not anticipated in the near future. The asset receives regular maintenance.
\nAsset shows signs of wear but has not yet entered a potential failure state. Asset has the potential to be maintained at a level 3 for some period of time if the proper maintenance is completed and repairs are made. Asset may show light rust, some light wear and tear, or be nearing, but not at, physical capacity.
\nAsset is in potential failure, but not functional failure mode. Functional failure not expected within the next year (if so, should be PoF of 5). Potential failure means the asset is showing signs of failure, such as cracks, root intrusions, vibration, noise, excessive rust, but is still delivering all or most of the required service. The potential failure issues will need to be addressed to prevent a functional failure. Functional failure occurs when the asset is in one of the four failure modes.
\nAlready in functional failure mode (Mortality \u2013 already broken, collapsed; Level of Service – not doing what it\u2019s supposed to; Capacity \u2013 not sufficiently sized; Financial Inefficiency \u2013 costing too much to continue to use) or expected to be in functional failure mode within 1 year. A failure of one of the four types is imminent, if the asset is not already in failure mode.” _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/dvmd_table_maker_item][\/dvmd_table_maker][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.16″ _module_preset=”default” width=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.27.6″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” sticky_enabled=”0″]<\/p>\nOnce a rating structure is created, it should be tested in the field using a variety of asset types to make sure it is understandable to those who will be applying it and to make sure it achieves the correct results. Following a successful test of the structure, the\u00a0utility\u00a0should create standard operating procedures (SOPs) for the application of probability of failure ratings to each asset\u00a0to ensure\u00a0the process is performed consistently among staff members. The SOPs can also be used to train\u00a0new staff\u00a0members\u00a0on\u00a0the process and ensure that the ratings stay consistent when current staff members leave the utility, change roles,\u00a0or retire.<\/span>\u00a0<\/span><\/p>\nConsider all four\u00a0<\/span>failure modes<\/span>\u00a0when assigning a rating\u00a0to\u00a0make informed judgements about the probability of failure across all types of assets. If the\u00a0utility\u00a0can collect and store\u00a0the information, it is also valuable to\u00a0identify\u00a0which failure mode(s) are likely.\u00a0The more\u00a0relevant\u00a0empirical data is collected on an asset, the more\u00a0accurate\u00a0and objective the probability of failure estimate will\u00a0be\u00a0and the more consistent they will be with industry best practice.\u00a0The following examples use a rating scale of 1-5 with 1 being least likely to fail.<\/span>\u00a0<\/span><\/p>\nExample:\u00a0Asset A\u2019s probability of failure rating is a four\u00a0and\u00a0is likely to fail via level of service\u00a0failure.\u00a0<\/span>\u00a0<\/span><\/p>\nExample:\u00a0Asset B\u2019s probability of failure rating is a 2 and\u00a0is likely to fail via mortality\u00a0failure.\u00a0<\/span>\u00a0<\/span><\/p>\nExample: Asset C\u2019s probability of failure rating is a\u00a05 and is likely to fail via mortality and level of service failure.<\/span>\u00a0<\/span><\/p>\nCollecting data to help\u00a0determine\u00a0the probability of failure for green assets may be more challenging initially because their inclusion in this type of analysis is a\u00a0relatively new\u00a0practice compared to gray assets. Additionally, collecting the\u00a0appropriate data\u00a0may require\u00a0expertise\u00a0that is outside the typical knowledge of a water or wastewater system (e.g., fire, forestry, geomorphology.)<\/span>\u00a0<\/span><\/p>\nIt is not\u00a0appropriate\u00a0or advisable to compare asset probability of failure ratings from two unrelated facilities (e.g., a water system in Massachusetts and a water system in Arizona.)\u00a0The intent is to compare assets within a system. However, if an entity is managing multiple systems in the same area (e.g., the city owns 4 treatment plants that serve its population), the same rating system can and should be used in each of these plants. The entity is likely to want to\u00a0determine\u00a0which plant(s)\u00a0require\u00a0the most investment and comparing on the same basis\u00a0will be\u00a0beneficial.\u00a0<\/span>\u00a0<\/span><\/p>\nOnce all assets are assigned a probability of failure rating, staff should review the results to see if they make sense or if there seem to be anomalies with certain types of assets or specific assets. If necessary, adjustments can be made to the rating structure to ensure it adequately\u00a0represents\u00a0the situation.<\/span><\/p>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"
Creating Probability of Failure Ratings To calculate the criticality\u00a0score\u00a0of an asset, the probability of failure of\u00a0an\u00a0asset needs to be quantified.\u00a0A\u00a0probability of failure rating structure that includes a numeric rating as well as a description of each rating\u00a0ensures that all staff are scoring assets\u00a0the same way. One of the best ways to develop these\u00a0standardized criteria is to\u00a0engage\u00a0a cross-section of system personnel who have different viewpoints and different experiences with the assets. Staff should choose a rating scale, such as 1 to 5 or 1 to 10, and keep the descriptions broad enough so the ratings can apply to any assets (gray and green) in the system. Creating these ratings does not have to be a long, time-intensive activity. A small system should be able to complete the process of developing the rating structure by meeting a few\u00a0times for\u00a0a few hours each. A larger system may take longer and may wish to have a more\u00a0expansive\u00a0rating system.\u00a0 There are no industry standards for probability of failure for given assets, so they are best defined by\u00a0utility staff.\u00a0Consider how many levels of ratings will work best for your utility.\u00a0\u00a0 An even number of ratings can\u00a0deter staff from the natural temptation to pick a middle […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-5622","page","type-page","status-publish","hentry"],"yoast_head":"\n
Criticality \/ Probability of Failure \/ Creating Probability of Failure Ratings - Integrated Asset Management Framework<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Criticality \/ Probability of Failure \/ Creating Probability of Failure Ratings - Integrated Asset Management Framework\" \/>\n<meta property=\"og:description\" content=\"Creating Probability of Failure Ratings To calculate the criticality\u00a0score\u00a0of an asset, the probability of failure of\u00a0an\u00a0asset needs to be quantified.\u00a0A\u00a0probability of failure rating structure that includes a numeric rating as well as a description of each rating\u00a0ensures that all staff are scoring assets\u00a0the same way. One of the best ways to develop these\u00a0standardized criteria is to\u00a0engage\u00a0a cross-section of system personnel who have different viewpoints and different experiences with the assets. Staff should choose a rating scale, such as 1 to 5 or 1 to 10, and keep the descriptions broad enough so the ratings can apply to any assets (gray and green) in the system. Creating these ratings does not have to be a long, time-intensive activity. A small system should be able to complete the process of developing the rating structure by meeting a few\u00a0times for\u00a0a few hours each. A larger system may take longer and may wish to have a more\u00a0expansive\u00a0rating system.\u00a0 There are no industry standards for probability of failure for given assets, so they are best defined by\u00a0utility staff.\u00a0Consider how many levels of ratings will work best for your utility.\u00a0\u00a0 An even number of ratings can\u00a0deter staff from the natural temptation to pick a middle […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/\" \/>\n<meta property=\"og:site_name\" content=\"Integrated Asset Management Framework\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-15T19:47:57+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/criticality-probability-of-failure-creating-probability-of-failure-ratings\\\/\",\"url\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/criticality-probability-of-failure-creating-probability-of-failure-ratings\\\/\",\"name\":\"Criticality \\\/ Probability of Failure \\\/ Creating Probability of Failure Ratings - Integrated Asset Management Framework\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/#website\"},\"datePublished\":\"2021-03-09T21:24:59+00:00\",\"dateModified\":\"2026-04-15T19:47:57+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/criticality-probability-of-failure-creating-probability-of-failure-ratings\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/criticality-probability-of-failure-creating-probability-of-failure-ratings\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/criticality-probability-of-failure-creating-probability-of-failure-ratings\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Criticality \\\/ Probability of Failure \\\/ Creating Probability of Failure Ratings\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/#website\",\"url\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/\",\"name\":\"Integrated Asset Management Framework\",\"description\":\"Combining Green and Gray Assets\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/swefc.unm.edu\\\/iamf\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Criticality \/ Probability of Failure \/ Creating Probability of Failure Ratings - Integrated Asset Management Framework","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/","og_locale":"en_US","og_type":"article","og_title":"Criticality \/ Probability of Failure \/ Creating Probability of Failure Ratings - Integrated Asset Management Framework","og_description":"Creating Probability of Failure Ratings To calculate the criticality\u00a0score\u00a0of an asset, the probability of failure of\u00a0an\u00a0asset needs to be quantified.\u00a0A\u00a0probability of failure rating structure that includes a numeric rating as well as a description of each rating\u00a0ensures that all staff are scoring assets\u00a0the same way. One of the best ways to develop these\u00a0standardized criteria is to\u00a0engage\u00a0a cross-section of system personnel who have different viewpoints and different experiences with the assets. Staff should choose a rating scale, such as 1 to 5 or 1 to 10, and keep the descriptions broad enough so the ratings can apply to any assets (gray and green) in the system. Creating these ratings does not have to be a long, time-intensive activity. A small system should be able to complete the process of developing the rating structure by meeting a few\u00a0times for\u00a0a few hours each. A larger system may take longer and may wish to have a more\u00a0expansive\u00a0rating system.\u00a0 There are no industry standards for probability of failure for given assets, so they are best defined by\u00a0utility staff.\u00a0Consider how many levels of ratings will work best for your utility.\u00a0\u00a0 An even number of ratings can\u00a0deter staff from the natural temptation to pick a middle […]","og_url":"https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/","og_site_name":"Integrated Asset Management Framework","article_modified_time":"2026-04-15T19:47:57+00:00","twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/","url":"https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/","name":"Criticality \/ Probability of Failure \/ Creating Probability of Failure Ratings - Integrated Asset Management Framework","isPartOf":{"@id":"https:\/\/swefc.unm.edu\/iamf\/#website"},"datePublished":"2021-03-09T21:24:59+00:00","dateModified":"2026-04-15T19:47:57+00:00","breadcrumb":{"@id":"https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/swefc.unm.edu\/iamf\/criticality-probability-of-failure-creating-probability-of-failure-ratings\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/swefc.unm.edu\/iamf\/"},{"@type":"ListItem","position":2,"name":"Criticality \/ Probability of Failure \/ Creating Probability of Failure Ratings"}]},{"@type":"WebSite","@id":"https:\/\/swefc.unm.edu\/iamf\/#website","url":"https:\/\/swefc.unm.edu\/iamf\/","name":"Integrated Asset Management Framework","description":"Combining Green and Gray Assets","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/swefc.unm.edu\/iamf\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/swefc.unm.edu\/iamf\/wp-json\/wp\/v2\/pages\/5622","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swefc.unm.edu\/iamf\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/swefc.unm.edu\/iamf\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/swefc.unm.edu\/iamf\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/swefc.unm.edu\/iamf\/wp-json\/wp\/v2\/comments?post=5622"}],"version-history":[{"count":21,"href":"https:\/\/swefc.unm.edu\/iamf\/wp-json\/wp\/v2\/pages\/5622\/revisions"}],"predecessor-version":[{"id":25739,"href":"https:\/\/swefc.unm.edu\/iamf\/wp-json\/wp\/v2\/pages\/5622\/revisions\/25739"}],"wp:attachment":[{"href":"https:\/\/swefc.unm.edu\/iamf\/wp-json\/wp\/v2\/media?parent=5622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}