We're confident that we can give you quality information about how we're doing, and we're confident that with that information you will have the best chance of helping us be successful. Sometimes teams believe that even with the best knowledge of what the schedule will really be, their management is so draconian, so unenlightened, so evil, that the process can't possibly work. Well, if it's really that bad, I'd advise you to hit the silk. But more likely, management has been lied to, misled, bamboozled, and spun so many times that they have come to believe that nothing works but pressure. Give the process a chance.
Most managers really are more than ready to use accurate information to make better decisions.
Every time you do this process, your knowledge of what will happen improves. If every time you report, you tell them what you really believe will happen, even the most dull management will finally figure out that your estimates are better than whatever they are shouting. They'll shout at you that it must be done in June. Our schedule shows that we'll be done in September. They'll shout, but they won't be so sure.