By reducing the Employee Engagement challenge to surveys and project management when it is really more a matter of institutional soulcraft, you run the risk of taking unearned comfort in the illusion of rigor: “This must be valid. There are many numbers, and many of those numbers have several decimal places!” You also run a serious--and ironic--risk of causing them to dis-engage by treating people as resources or capital assets rather than as important contributors to the cause.