Usability audits and expert reviews are a simple, essential first step toward improvement. Usability audits are often tailored to specific questions or needs, but can also reveal potential issues that weren't noticed or considered yet.
Res.im has done usability audits tied to specific conversion goals to help diagnose causes of drop-off. We've also audited complex sites and intranets that support dozens of user tasks. Though not as definitive as usability tests, audits or expert reviews are a cost-effective way to make a case for improvements or other next steps.
Usability testing and recommendations engagements start at $5000 and can be done in as little as 2 weeks.