During manual evaluation, observe how many methods of navigating the site or web app exist. Any web pages that aren't part of a sequence (e.g. a confirmation page would only be reachable after completing a form) must be reachable by 2 different methods from the list below.
Links in navigation areas and content areas (that is to say, any page would have a link to it from some other page on the site)
Site Search
Site Map
Table of Contents
A list of links to all pages on the site
The ability to access all pages from links on the homepage
Part of a Sequence
Pages that would be considered part of a sequence is any specific page that you cannot access without first navigating to another page. Appropriate examples of pages that are part of a sequence include
Form pages that are accessed one after another
Forms and pages that are accessed after a CAPTCHA or similar test