{"id":21926,"date":"2026-01-20T10:01:47","date_gmt":"2026-01-20T09:01:47","guid":{"rendered":"https:\/\/e-opex.pl\/?p=21926"},"modified":"2026-01-20T10:26:40","modified_gmt":"2026-01-20T09:26:40","slug":"whats-worse-than-a-bar-chart","status":"publish","type":"post","link":"https:\/\/e-opex.pl\/en\/whats-worse-than-a-bar-chart\/","title":{"rendered":"What&#8217;s worse than a bar chart?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"21926\" class=\"elementor elementor-21926\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2a7639f e-flex e-con-boxed e-con e-parent \" data-id=\"2a7639f\" data-element_type=\"container\" data-e-type=\"container\">\t\t\t<div class=\"e-con-inner\">\r\n\t\t\t\t<div class=\"elementor-element elementor-element-b18fb72 elementor-widget elementor-widget-pxl_heading\" data-id=\"b18fb72\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"pxl_heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n<div id=\"pxl-pxl_heading-b18fb72-2362\" class=\"pxl-heading px-sub-title-default-style \">\n\t<div class=\"pxl-heading--inner\">\n\t\t\n\t\t<h2 class=\"pxl-item--title style-default  highlight-default \" data-wow-delay=\"ms\">\n\t\t\t\t\t\t\tWhat&#8217;s worse than a bar chart? A 3D bar chart\t\n\t\t\t\t\n\t\t<\/h2>\n\t\t\n\t<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7759eca animated-slow elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"7759eca\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeIn&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Every chart has only one purpose: <strong>to show the truth contained in the data\u2014and to do it as quickly as possible<\/strong>. And that&#8217;s precisely where the classic chart struggles.<\/p><p>A bar chart looks innocent: it shows a single number as the height of the bar. The problem is that a bar has <strong>two dimensions<\/strong>\u2014height and width\u2014while the data only has one. Height carries information. Width is pure decoration. In many situations, a line, a point, or simply a number would convey the exact same information faster and more clearly.<\/p><p>But that&#8217;s just the beginning! Bars encode values \u200b\u200bby <strong>length<\/strong>, and length always refers to zero.<\/p><p>Therefore, a bar chart <strong>must<\/strong> start at zero.<\/p><p>If the Y-axis doesn&#8217;t start at zero:<\/p><ul><li>visual differences no longer correspond to numerical differences,<\/li><li>proportions between categories become distorted,<\/li><li>the chart begins to tell a story that simply isn&#8217;t there in the data.<\/li><\/ul><p>This isn&#8217;t a minor aesthetic flaw. It violates the meaning of the data.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d29e6d6 elementor-widget elementor-widget-image\" data-id=\"d29e6d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/1.-Layout-en.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"1. Layout en\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjE5MDksInVybCI6Imh0dHBzOlwvXC9lLW9wZXgucGxcL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjZcLzAxXC8xLi1MYXlvdXQtZW4uanBnIn0%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/1.-Layout-en-1024x683.jpg\" class=\"attachment-large size-large wp-image-21909\" alt=\"\" srcset=\"https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/1.-Layout-en-1024x683.jpg 1024w, https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/1.-Layout-en-300x200.jpg 300w, https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/1.-Layout-en-768x512.jpg 768w, https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/1.-Layout-en-1065x710.jpg 1065w, https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/1.-Layout-en.jpg 1152w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8756c9a elementor-widget elementor-widget-text-editor\" data-id=\"8756c9a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Click to enlarge<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dfab420 elementor-widget elementor-widget-text-editor\" data-id=\"dfab420\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In practice, simply shifting the bottom of the axis is enough to turn &#8220;small changes&#8221; into &#8220;dramatic increases or decreases.&#8221; Sometimes this happens unconsciously. Sometimes very consciously.<\/p><p><strong>And now the 3D version\u2014or how to make it even worse.<\/strong><\/p><p>A bar chart is already a compromise: it hides variability, imposes length interpretations, and facilitates the creation of false stories.<\/p><p>The 3D version does something worse. It adds a third dimension that:<\/p><ul><li>carries no information,<\/li><li>distorts perception,<\/li><li>and dramatically increases the risk of erroneous conclusions.<\/li><\/ul><p>The viewer must &#8220;straighten&#8221; the chart in their head before they can understand it. This means that the chart is neither fast, reliable, nor cognitively efficient. 3D is not &#8220;more advanced.&#8221; It is simply <strong>more misleading<\/strong>.<\/p><p><strong>And what can be used instead of bars?<\/strong><\/p><p>If the data has a <strong>single dimension<\/strong>, dots will work perfectly.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4cd5238 elementor-widget elementor-widget-image\" data-id=\"4cd5238\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/2.-Layout-en.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"2. Layout en\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjE5MTMsInVybCI6Imh0dHBzOlwvXC9lLW9wZXgucGxcL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjZcLzAxXC8yLi1MYXlvdXQtZW4uanBnIn0%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/2.-Layout-en-1024x683.jpg\" class=\"attachment-large size-large wp-image-21913\" alt=\"\" srcset=\"https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/2.-Layout-en-1024x683.jpg 1024w, https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/2.-Layout-en-300x200.jpg 300w, https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/2.-Layout-en-768x512.jpg 768w, https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/2.-Layout-en-1065x710.jpg 1065w, https:\/\/e-opex.pl\/wp-content\/uploads\/2026\/01\/2.-Layout-en.jpg 1152w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-967c546 elementor-widget elementor-widget-text-editor\" data-id=\"967c546\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Click to enlarge<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f60e22e elementor-widget elementor-widget-text-editor\" data-id=\"f60e22e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>If your data also has a time history and you want to know if the process is changing, use\u2014as Donald J. Wheeler called it\u2014<strong>Process Behavior Charts<\/strong>. They&#8217;re the <strong>Maybach of charts<\/strong>. Instead of telling stories, they show facts: variability, stability, and real process changes.<\/p><p>If you have <strong>two dimensions, a boxplot<\/strong> will reveal more truth than any bars.<\/p><p>Only when the data is truly three-dimensional should you consider a 3D chart.<\/p><p>The visualization format should stem from the question you&#8217;re answering\u2014not from the desire to &#8220;make it look cool.&#8221;<\/p><p><strong>Data doesn&#8217;t lie. Charts often do.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-560cc86 elementor-widget elementor-widget-pxl_button\" data-id=\"560cc86\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"pxl_button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div id=\"pxl-pxl_button-560cc86-7750\" class=\"pxl-button pxl-atc-link \" data-wow-delay=\"ms\">\r\n    <a href=\"https:\/\/www.linkedin.com\/company\/opex-group-wroclaw\/\" class=\"btn pxl-icon-active  btn-default  inline pxl-icon--left\" data-wow-delay=\"ms\" data-target=\".pxl-page-popup-template-0\">\r\n        <i aria-hidden=\"true\" class=\"bootstrap-icons bi-linkedin\"><\/i>        <span class=\"pxl--btn-text\" data-text=\"LinkedIn\">\r\n            LinkedIn        <\/span>\r\n            <\/a>\r\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9366889 elementor-widget elementor-widget-pxl_heading\" data-id=\"9366889\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"pxl_heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n<div id=\"pxl-pxl_heading-9366889-4064\" class=\"pxl-heading px-sub-title-default-style \">\n\t<div class=\"pxl-heading--inner\">\n\t\t\n\t\t<h3 class=\"pxl-item--title style-default  highlight-default \" data-wow-delay=\"ms\">\n\t\t\t\t\t\t\tAuthor: Katarzyna Kornicka, OpEx Six Sigma Master Black Belt\t\n\t\t\t\t\n\t\t<\/h3>\n\t\t\n\t<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\r\n\t\t\t\t<\/div>\r\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>What&#8217;s worse than a bar chart? A 3D bar chart Every chart has only one purpose: to show the truth contained in the data\u2014and to do it as quickly as possible. And that&#8217;s precisely where the classic chart struggles. A bar chart looks innocent: it shows a single number as the height of the bar. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21943,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[104],"tags":[],"class_list":["post-21926","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-opex-stories"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What&#039;s worse than a bar chart? - OpEx Group<\/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:\/\/e-opex.pl\/en\/whats-worse-than-a-bar-chart\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What&#039;s worse than a bar chart? - OpEx Group\" \/>\n<meta property=\"og:description\" content=\"What&#8217;s worse than a bar chart? A 3D bar chart Every chart has only one purpose: to show the truth contained in the data\u2014and to do it as quickly as possible. And that&#8217;s precisely where the classic chart struggles. A bar chart looks innocent: it shows a single number as the height of the bar. 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