The more complex your code, the tougher it is to test!!
Are you the QA that needs to make sure everything is ready for production? Are you the Development manager that needs to signoff on the go-no-go decision?
Your QA team may be eliminating some of the problems using “Risk Based Testing” or other methods, but they are far from completely resolving the issue. You are not alone – most companies do not run full tests on their systems.