As your enterprise implements transitioning to a continuous process, what obstacles can they expect?

Strategic planning horizons have changed from 5 years, to 3 years and even to 1 year. This unit advocates a continuous process that includes quarterly reviews of projects, programs, and portfolios where changes to the strategic plan can be made at any quarterly review. As your enterprise implements transitioning to a continuous process, what obstacles can they expect? What would you recommend they do to mitigate these obstacles?