OWASP Top 10. On top of development, ensure you have all of the recommended security headers to enforce SSL, prevent XSS and prevent framejacking and are following best practices for securing the web server and infrastructure access.
There are a number of tools for testing system performance from Apache Benchmark to JMeter. Find the appropriate tool for your use case, test the site until it breaks and improve until you are a few standard deviations above the expected traffic.
Having a well-performing server is great, but the front-end code will drastically influence the perceived website performance. Google PageSpeed Insights and Google Lighthouse are great tools for evaluating perceived performance.
Building a website accessible to everyone is both a business and moral imperative. Browser tools such as WAVE or ANDI can help perform technical accessibility compliance tests for websites and should be used to validate the delivered code as well as the authored content.
Some common Accessibility issues include designs that are difficult to read, insufficient contrast and non-required accessibility metadata.
Finally, a relaunch / migration should consider more than just the website. Make sure that 3rd party services, internal / external branding and communications are aligned to support the relaunch.
There’s a lot to consider when approaching a website migration or relaunch. Perficient’s expert consultant teams can support your success no matter the platform.