My title at EMC is “Software Development Manager,” but my job is definitely “Software Engineering Manager.”
Usually in a software engineering organization, at some level there is a split between the Development team and the Quality team. The Development team, in theory, is evaluated on its ability to Develop software. The Quality team likewise is evaluated on its ability to Qualify that software. While nobody wants the Development team to produce a buggy product, in the end it’s the Quality team who makes the decision on whether the software is bug-free enough to ship to customers. You don’t trust the Development team to make that decision. It’s a system of checks and balances.