The Site Test Center application is designed to automate the process of the testing of the Web Sites, Web Applications and Web Services. It allows to perform stress tests and tests of the functionality of the server side parts of you application. Using flexible and powerful scripting model you can create a testing scripts that will simulate a regular user session or test particular server parts of you web application. Distributed testing model allows you to create testing environment that will suit your needs. You can use a single PC to run some kind of the functionality test during development and QA stage of the project as well as multi-PCs environment to perform stress and load tests. Script execution can be started immediately or scheduled to start at the given time, and can be stopped after the given number of runs, or at the given time, or after the given number of the errors.