Why Strict Priority Isn't Always Optimal - Rethinking Waiting Lines

Dr. Alan Scheller-Wolf, the Richard M. Cyert Professor of Operations Management at the Tepper School of Business, Carnegie Mellon University, joins us to unpack the key insights from his research, 'When Does Partial Priority Improve Revenue?', a study developed in collaboration with Dr. Mor Harchol-Balter, Professor of Computer Science at Carnegie Mellon University, and Zhouzi Li, doctoral research assistant at CMU. In this episode, Dr. Alan Scheller-Wolf takes us into the heart of a deceptively simple question that has profound implications for how service businesses think about revenue and fairness: When does giving up strict priority actually make you more money? His research uncovers a counterintuitive finding, partial priority systems, where a probabilistic mechanism determines who gets served next, outperform traditional strict priority only when both a price cap and a waiting time limit are simultaneously in place. To bring this to life, Dr. Scheller-Wolf draws on a vivid real-world example: Disney World's Lightning Lane. Under realistic Disney parameters, his model predicts a striking 53% revenue improvement, jumping from $2,400 to $3,600 per attraction per day, simply by switching to a partial priority policy. Yet Disney hasn't adopted it, and the reasons reveal something important: mathematics alone doesn't determine what businesses implement. Fairness perceptions, customer psychology, the anxiety of unpredictable wait times, and long-term brand trust all shape what's viable in practice. This research reminds us that the act of waiting in a line is far from mundane, it sits at the intersection of pricing strategy, human behavior, and operational design. This podcast is brought to you by Global Management Consultancy. Disclaimer: 1. The background music incorporated in this video is the intellectual property of its respective developer and is protected under applicable copyright laws. Notwithstanding that it is a free-to-use version, Business Talk, Global Management Consultancy, and Deepak Bhatt do not own, and expressly do not claim, any rights, title, or interest in or to this music. 2. In an engaging episode of the Business Talk podcast, Dr. Alan Scheller-Wolf unpacks the key insights from his co-authored research, "When Does Partial Priority Improve Revenue?" The uploaded video contains copyrighted content, so changing any graphics, music, or on-screen appearance of the author or host is not allowed.