Challenge: Large language models (LLMs) often produce factual errors due to limited internal knowledge.
Approach: They propose a retrieval-augmented generation framework that generates plan tokens to guide subsequent generation.
Outcome: The proposed framework improves the accuracy of large language models with external knowledge sources.

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A + B: A General Generator-Reader Framework for Optimizing LLMs to Unleash Synergy Potential (2024.findings-acl)

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Challenge: Retrieval-Augmented Generation (RAG) is an effective solution to supplement necessary knowledge to large language models.
Approach: They propose a "generate-then-read" pipeline to replace retrieval stage with generation from the LLM itself.
Outcome: The proposed framework outperforms single models in the base and chat versions and addresses safety and helpfulness post-adaptation challenges.
Can We Further Elicit Reasoning in LLMs? Critic-Guided Planning with Retrieval-Augmentation for Solving Challenging Tasks (2025.acl-long)

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Challenge: Existing approaches to problem-solving for large language models fail to provide accurate reasoning and factual accuracy.
Approach: They propose a framework that leverages fine-tuned critic models to guide reasoning and retrieval processes.
Outcome: The proposed framework outperforms baselines on domain-knowledge-intensive tasks . it can be used to iterate retrieval and reasoning, and improve retrieval relevance .
PlanRAG: A Plan-then-Retrieval Augmented Generation for Generative Large Language Models as Decision Makers (2024.naacl-long)

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Challenge: Existing methods for decision making require complex data analysis.
Approach: They propose a method that generates the plan for decision making as the first step and retrieves the queries for data analysis as the second step.
Outcome: The proposed method outperforms the state-of-the-art iterative plan-then-retrieval augmented generation method by 15.8% and 7.4% respectively.
Analysis of Plan-based Retrieval for Grounded Text Generation (2024.emnlp-main)

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Challenge: Large, parametric language models (LLMs) produce fluent text for many applications . hallucinations are generation of text that is factually correct and semantically plausible .
Approach: They propose to use learning-tuned LLMs to infuse models with retrieval mechanisms to reduce hallucinations.
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LLMs Know What They Need: Leveraging a Missing Information Guided Framework to Empower Retrieval-Augmented Generation (2025.coling-main)

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Challenge: Existing solutions to improve the accuracy of RAG are based on retrieval-augmented generation . however, RAG still faces several challenges in tackling complex multi-hop queries .
Approach: They propose a Missing Information Guided Retrieve-Extraction-Solving paradigm that leverages the identification of missing information to generate a targeted query.
Outcome: The proposed method can extract information from retrieved knowledge and know what is still missing.
LLM-Generated Text May Harm Your Retrieval! A Robust Detection Strategy for Retrieval-Augmented Generation (2026.acl-long)

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Challenge: Retrieval-augmented generation (RAG) improves accuracy and timeliness of large language models, but external corpora may become contaminated with LLM-generated texts.
Approach: They propose a method that integrates external knowledge retrieved from external sources into RAG to filter out LLM-generated texts from retrieved results.
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Efficient Integration of External Knowledge to LLM-based World Models via Retrieval-Augmented Generation and Reinforcement Learning (2025.findings-emnlp)

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Challenge: Existing attempts to enhance LLM-based world models through prompting or fine-tuning approaches are either requiring human knowledge or computationally extensive.
Approach: They propose a framework that leverages retrieval-augmented generation to integrate external knowledge to LLM-based world models.
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LLM-Enhanced Query Generation and Retrieval Preservation for Task-Oriented Dialogue (2025.findings-acl)

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Challenge: Existing knowledge retrieval methods for task-oriented dialogues are limited by data scarcity and lack of data to annotate.
Approach: They propose an LLM-enhanced model of query-guided knowledge retrieval for task-oriented dialogue . they propose to select the most relevant knowledge from retrieved top-K records and incorporate them as prompts to guide a generator in response generation.
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Evaluating Self-Generated Documents for Enhancing Retrieval-Augmented Generation with Large Language Models (2025.findings-naacl)

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Challenge: Recent research focuses on optimizing the use of Self-Docs with their inherent properties remaining underexplored.
Approach: They develop a taxonomy to compare the effectiveness of different types of Self-Docs and explore strategies for combining them with external sources.
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Learning to Plan for Retrieval-Augmented Large Language Models from Knowledge Graphs (2024.findings-emnlp)

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Challenge: Recent studies have attempted to enhance the performance of large language models (LLMs) in complex question-answering (QA) tasks by combining step-wise planning with external retrieval.
Approach: They propose a framework for enhancing LLMs’ planning capabilities by using planning data derived from knowledge graphs (KGs).
Outcome: The proposed framework improves LLMs’ planning capabilities by using knowledge graphs (KGs) the proposed framework is compared with existing frameworks on multiple datasets and shows that it is effective for large language models.

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