The final result, however, was even more interesting. Thereafter, whenever Bill's group was concerned about product quality, the product managers paid attention. They knew that if Bill's people objected, the other staffs would as well. The morals to this tale First, avoid fights with the bureaucrats. There are lots of them and they can easily nibble you to death.
Most organizations have such groups and they are hard to avoid.
With careful planning, however, you can address their concerns before they become an issue. Talk to them first and understand their views. Most of their issues will be nits that you can easily handle. You may have to fight over an occasional important issue, but there won't be many of these. If you don't line up these staffs in advance, they are likely to disagree with your plans.