Tolerance for the hiding of problems in project plans. If project managers are allowed to hide problems by padding schedules or making vague adjustments to project due dates, then some will take the easiest course to showing good results rather than completing high-quality work in compliance with the methodology.
Praise for heroic success. If a company praises project teams who stay up all night for the last month of project plans to bring it in on time, then the company is rewarding poor management.