Optimizing and Evaluating Enterprise Retrieval-Augmented Generation (RAG): A Content Design Perspective

Abstract: Retrieval-augmented generation (RAG) is a popular technique for using LLMs to build customer-support, question-answering solutions. In this paper, we share our team's practical experience building and maintaining enterprise-scale RAG solutions that answer users' questions about our software based on product documentation. Our experience has not always matched the most common patterns in the RAG literature. This paper focuses on solution strategies that are modular and model-agnostic. For example, our experience over the past few years - using different search methods and LLMs, and many knowledge base collections - has been that simple changes to the way we create knowledge base content can have a huge impact on our RAG solutions' success. In this paper, we also discuss how we monitor and evaluate results. Common RAG benchmark evaluation techniques have not been useful for evaluating responses to novel user questions, so we have found a flexible, "human in the lead" approach is required.