{"id":3144,"date":"2026-06-24T16:13:02","date_gmt":"2026-06-24T14:13:02","guid":{"rendered":"https:\/\/www.technical-center.de\/wiki\/form-inspection\/"},"modified":"2026-06-24T16:13:02","modified_gmt":"2026-06-24T14:13:02","slug":"form-inspection","status":"publish","type":"encyclopedia","link":"https:\/\/www.technical-center.de\/en\/glossary\/form-inspection\/","title":{"rendered":"Form inspection"},"content":{"rendered":"\n<p><strong>Definition:<\/strong> Form inspection is the metrological determination of deviations of a real workpiece from the ideal geometric form. Form characteristics such as roundness, flatness, straightness or cylindricity are assessed. The basis is the geometrical product specifications (GPS) according to DIN EN ISO 1101.<\/p>\n<p><strong>Practical relevance:<\/strong> Form deviations affect the fit, function and service life of technical components. The assessment is carried out by comparing the measured actual contour with defined tolerance zones. Measuring instruments are coordinate measuring machines (CMM), roundness measuring instruments or optical measuring systems. Compliance with form and position tolerances is often contractually stipulated.<\/p>\n<p><strong>Decision-making perspectives:<\/strong><\/p>\n<ul>\n<li><strong>Technical decision-makers:<\/strong> Ensuring functional fits and minimising wear or vibration.<\/li>\n<li><strong>Purchasing\/project management:<\/strong> Definition of clear tolerance requirements in technical drawings.<\/li>\n<li><strong>Science:<\/strong> Analysis of manufacturing deviations and measurement uncertainties.<\/li>\n<li><strong>Insurance\/law:<\/strong> Proof of dimensional or tolerance deviations in the event of complaints.<\/li>\n<\/ul>\n<p><strong>Typical testing or verification methods:<\/strong> Coordinate <a class=\"tc-inlink\" href=\"\/en\/calibration-metrology\/\">metrology<\/a> (CMM), roundness testing, profile and contour measurement, tactile or optical measuring methods.<\/p>\n<p><strong>FAQ:<\/strong><\/p>\n<ul>\n<li>Which standard governs form and position tolerances?<\/li>\n<li>DIN EN ISO 1101 defines geometric tolerances within the framework of the GPS system.<\/li>\n<\/ul>\n","protected":false},"author":0,"featured_media":0,"template":"","encyclopedia-tag":[],"class_list":["post-3144","encyclopedia","type-encyclopedia","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia\/3144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia"}],"about":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/types\/encyclopedia"}],"wp:attachment":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/media?parent=3144"}],"wp:term":[{"taxonomy":"encyclopedia-tag","embeddable":true,"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia-tag?post=3144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}