Recommendation as a service (RaaS): New challenges for, and evaluation metrics of recommender systems

摘要

Advertisement turns into recommendation, web services become independent apps, and mobile devices enforce context awareness. Recommendation as a Service (RaaS) turns into an independent application-based business. By analyzing the trends, the paper introduces a multi-dimensional evaluation scheme to characterize recommender systems. The chart is applied to different research implementations, emphasizing their specifics. Requirements and trends for the future are derived.