Virtualization and its contribution to QA

There are many benefits to using virtual machines in testing. First, we need to bear in mind that applications change, and QA must test different applications in different conditions. for example testing different UI applications on different host types will potentially require a lot of resources which in these times of financial instability may pose a problem, since theoretically, it will require separate machines for each type of set-up, in the same manner when keeping a big version install the base you will need to maintain different machines running different versions of the SUT (System Under Test). In order to provide for this need one of the best cost-effective solutions would be running multiple virtual machines. This solution allows for running endless versions in parallel... this is effective for both QA and Support since one can simulate defects/ retest them knowing with full confidence that his system is identical to the one of the customer reporting the problem. further to this virtual machines can be used to allow easier/ simpler deployments or upgrades, since you can send the machines preconfigured in advance from the factory. As can be seen, there are many advantages to using virtual machines in QA.