| Hosting / infrastructure only | Origin, server, runtime, storage, network or CDN configuration | Domain, public URLs, content structure and front-end experience | Environment parity, DNS, certificates, caching, forms, integrations, logs | Runtime complexity, traffic, DNS ownership, server configuration |
| CMS / platform migration | Content model, templates, plugins/apps, database structures and admin workflows | Brand, content meaning and sometimes URLs | Content completeness, templates, permissions, forms, search, integrations, SEO signals | Content volume, data transformation, custom features, third-party dependencies |
| Domain / subdomain move | Hostname and often DNS, certificates, cookies, integrations and public URLs | Page content and application logic may remain similar | Redirects, DNS, canonical signals, sitemaps, analytics, external callbacks, mail records | Number of domains, DNS complexity, integrations, redirect coverage |
| URL / IA restructure | Paths, slugs, route hierarchy, internal links and often metadata references | Domain and hosting may remain stable | URL mapping, redirects, canonicals, internal links, sitemap, 404s | URL count, parameters, archives, multilingual or faceted routing |
| Modernization + migration | Multiple layers can change together: design, front end, back end, platform, content model and routes | Business intent and selected content may remain | Acceptance criteria, feature parity, responsive QA, performance, accessibility, redirects, launch readiness | Parallel workstreams, feature change, content readiness, approval and release governance |