Compatibility, Interoperability, Usability Testing

Compatibility - Part 1

Browser display issues, browser event issues

Compatibility - Part 2

Multiple platforms, browsers, versions and screen resolution compatibility checking gomez

Interoperability

Google analytics on user environment details, Database compatibility, Interop with OS ad Devices

Usability

Ease of use, Simplicity, Clarity, Online help, Configurability, make users feel your application ,Consistency