Problem comes from BigCo approach to people. Such corporations would like to have a QA team that should be utilized to a 100%. So that if they don't have much

Problem comes from BigCo approach to people. Such corporations would like to have a QA team that should be utilized to a 100%. So that if they don't have much work on project X you just drop them into project Y. In reality we all know that is just not possible, because people have to have domain knowledge and keep up with changes. It is not like if you come back to project after 2 months you will be proficient with it as the world changed. This way if project X has slow times, dedicated QA will have less to do and BigCo has to eat that "loss". In small startup it is easier to have QA incorporated into dev/product team because as software is constantly changed there is work to be done all the time.