Indexed URL count
The mapping exercise scales with it directly, and it is usually larger than the organisation expects
Source CMS
Joomla site with clean SEF URLs maps faster than a Liferay portal encoding session state
Content structure complexity
How many distinct record types exist, and whether any require custom fields
Language count
Each language multiplies the mapping and the verification
Integration count
Every system the content management system exchanges data with needs rebuilding and testing
Whether design changes at the same time
Combining migration and redesign is usually efficient, because you pay for URL mapping once rather than twice
Typical duration. The pre-migration audit runs one to three weeks and must complete before the build starts because the build depends on its output. Institutional migrations then run three to six months across build, content migration, testing and launch. These projects typically include ninety days of verification after cutover, with the monitoring period confirmed in the written scope.
The standalone migration SEO protection service has a separate thirty-day monitoring scope. Agree the applicable period before launch.
We audit, we scope, then we quote. A number issued before the URL inventory exists is a guess, and on institutional content management systems guesses get expensive.