The Portfolio Management Office must ensure the project delivery methods deliver the business' desired outcomes, rather than just "finishing" a project.
Critical Success Factors are prerequisites to the success of the project, not the most important measures of success.
Do you challenge enough? Are you thinking deeply or just accepting what you are told? We are taught NOT to think, we need to jettison this.
Ignoring the obvious. Risk management is inevitable if the project needs to run smoothly. If they are ignored, the organization may lose the direction of its objectives.
Identifying, assessing and managing your project's and benefits' delivery risks is essential and can be simple.