Check: heavy product, gallery, and specification pages. Evidence required: field and lab performance data for representative templates, crawl diagnostics, and examples of slow assets. Pass condition: priority pages are crawlable, render usable content, and do not have unresolved performance problems that block access to specifications.
Fail condition: important content is unavailable to crawlers, depends on broken rendering, or is materially obstructed by avoidable asset weight. Severity: high when commercial or specification pages are affected.
Owner: web development with SEO review. Corrective action: optimize images and document delivery, reduce avoidable script or template overhead, and fix crawl barriers. Validation: retest representative URLs with Google PageSpeed Insights and confirm crawl and indexation in Google Search Console.
Check: structured data on applicable product pages. Evidence required: the page content, the structured data currently emitted, and validation output. Pass condition: markup uses documented types and properties that match visible page content.
Fail condition: markup invents unsupported attributes, contradicts the page, or is added solely to chase a search feature. Severity: medium unless invalid markup is part of a wider template defect. Owner: SEO and development.
Corrective action: keep only applicable Schema.org markup and correct mismatched values. Validation: test the deployed page with Google Rich Results Test where relevant and inspect the rendered source.
Check: PDF technical data sheets. Evidence required: crawlable document URLs, titles, metadata, text extractability, and the HTML pages that reference them. Pass condition: critical specifications are available in usable HTML where buyers need them, while downloadable PDFs remain accessible and linked appropriately.
Fail condition: important information exists only inside inaccessible or poorly linked documents. Severity: high for core product lines. Owner: content, product, and web teams. Corrective action: mirror essential technical information on the corresponding HTML page and keep clear links to the downloadable file and the existing /industry/manufacturing/glass-manufacturers page.
Validation: crawl the affected paths with Screaming Frog and confirm the HTML page and document can both be reached through internal links.
Check: XML sitemap coverage. Evidence required: current sitemap files, indexed URL reports, canonical targets, and product-category priorities. Pass condition: indexable commercial and technical pages appear in the appropriate sitemap while redirects, duplicate states, and non-indexable URLs do not.
Fail condition: important product pages are omitted or low-value duplicate states dominate sitemap coverage. Severity: high when indexation is affected. Owner: SEO and development. Corrective action: align sitemap generation with canonical, indexable URLs. Validation: recheck the sitemap in Google Search Console and compare submitted versus indexed coverage.