This forces borrowers to communicate higher quality information indicating their actual highest priority books. Which helps the library improve the economics a

This forces borrowers to communicate higher quality information indicating their actual highest priority books. Which helps the library improve the economics and provide the best service for the resources they have to work with. Having each reader's hold list interpreted as an ordered prioritized list would add even more information. People with similar lists but differing priorities would be served even better, more cheaply.