With hospitals across the country launching pilot programs aimed at improving how they dispense medical care, a leading management sage is calling for a more focused and "holistic" healthcare delivery strategy to reshape a business sector integral to the US economy. "In America, we have a very strong science base, and we have a very strong engine for new technology," said Harvard Business School professor Michael Porter. "But we're coming to understand that it's not just about science, it's about how we deliver healthcare. I've come to believe this is the bottleneck." Both the Massachusetts and U.S. governments have passed landmark legislation to broaden health insurance coverage and boost access to care, but Porter said such steps are not enough. The true measure for success in healthcare is improving "value," he said. Porter defined value as patient outcomes measured against every dollar spent.