I've found that many people that tell you what you want to hear change their tune once their own money/work/happiness is involved.<p>Make compensation dependent on a products success and your employees will start speaking a bit more clearer.<p>Instead of relying on a review process to rate employees, a company might let people choose who they work with and on what projects.<p>If a significant portion of one's income can actually be influenced by an employee's choices, they will tend to act on what they know rather than tell you what you what to hear.<p>In other words, people should have a stake or actual stock in their projects, not stock in the whole company.<p>And if its actual stock that can be traded within the company, the stock price will tell you whether the project is going to succeed.