Speculation: It appears they are using this for the overarching structure of projects. Rather than managing individual appointments it manages overall time, e.g

Speculation: It appears they are using this for the overarching structure of projects. Rather than managing individual appointments it manages overall time, e.g. on this day BobbySue should be spending 50% of her time on project A and 50% on project B. Then you can make the calendar read only from the digital side. That being said, I would still like to see a pick-n-place managed version of this that stays in sync with google calendar.