The Federal Acquisition Streamlining Act, Title V states, “the head of each executive agency should achieve, on average, 90 percent of the cost and schedule goals established for major and nonmajor acquisition programs of the agency without reducing the performance or capabilities of the items being acquired."
And how might this goal be achieved in the commercial sector? Achieved in a software development domain?
Who keeps score for the engineering side software development activities? The developer themselves? This is poor management practice in aerospace and defense. Optimism is the disease, feedback is the cure is a Kent Beck quote.
Project Managers that's who
The notion that project management "gets in the way," is both naive and uninformed.