What is BOS?
Best Object Scaling (BOS) aims to measure the relative preference among a set of objects, features, statements, attributes, brands, concepts, policies, processes, etc. through a series of explicit trade-offs that respondents make using an underlying subjective scale.

Outside of transportation, the use of trade-off analysis to inform public policy decision making has been somewhat limited, despite a decade-long track record of private sector success in using this technique for product and service development.