A Guide to Metrics and Stuffing Strategy Assessment In this post, you will learn how to set up and evaluate Retrieval-Augmented Generation (RAG) pipelines using LangChain. You will explore the impact of different chain types — Map Reduce, Stuff, Refine, and Re-rank — on the performance of your RAG pipeline. This guide is a practical introduction to using the ragas library for RAG pipeline evaluation. Starting with fundamental concepts, you’ll learn how different configurations affect your results.