... with a simple LLM prompt. They are wrong. An LLM can t hear a "crunchy" voice line, it can t accurately measure a 500ms "barge-in," and it struggles with the nuances of true conversational flow. When we built Cekura Monitoring , we realized we had to go beyond the LLM. We combined Heuristic and Statistical models with our Metric Optimizer to solve the "Scaling Wall." What we re actually tracking: Signal-Level Heuristics: We detect what LLMs miss - voice clarity ...