What is the expected load on the server (e.g., number of hits per unit time)?
What kind of performance is required under each load condition (such as web server response time, database query response times)?
What kind of tools will be required for performance testing (such as web load testing tools, other tools already in house that can be adapted, web robot downloading tools, etc.)?
Who is the target audience? What kind of browsers will they be using? What kind of connection speeds will they be using? Are they intra- organizations (thus likely with high connection speeds and similar browsers) or Internet-wide (thus with a wide variety of connection speeds and browser types)?
What kind of performance is expected from the client side (e.g., how fast should pages appear, how fast should animations, applets, etc. load and run)?
Will the downtime for server and content maintenance/upgrades be allowed? If so, then how much?
What kind of security (firewalls, encryption, passwords, etc.) will be required and what is it expected to do? How can it be tested?
How reliable is the site’s Internet connections required to be? And how does that affect the backup system or redundant connection requirements and testing?
What process will be required to manage updates to the web site’s content?