It has become part of Intel's core mission. In 1994, Intel released a chip where the floating point unit had an error when dividing very large numbers. While the significance of this bug is debated, Intel's name got drug through the mud because of their handling of this bug. Ever since then, the validation team has had a significant role in making sure that bugs are found and fixed - both during the design phase prior to silicon being etched and once Intel starts fabricating chips. It is this teams mission to make sure that Intel does not end up in the front page again for a bug issue.