Does staffing contain, as opposed to elevate, costs? Is there a point where the care delivery model and staffing become a detriment to cost control?

 Does staffing contain, as opposed to elevate, costs? Is there a point where the care delivery model and staffing become a detriment to cost control? That is, where does the law of diminishing returns kick in, both cost-wise and care-wise? 1 page, 2 sources, APA.