Problem
Research questions and friction points this paper is trying to address.
Agentic Time Series Forecasting
Time-Varying Effectiveness
Forecast Adaptation
When Tomorrow Becomes Today: Self-Evolving Policies for Agentic Time-Series Forecasting
🤖 AI Summary
为解决时间序列预测中模型随时间变化的有效性问题，本文提出TimEvolve方法，通过将每个实际结果转换为专家信任度、路径选择和干预强度的持久更新来系统地利用延迟反馈。
📝 Abstract
Agentic time series forecasting concerns systems whose underlying mechanisms evolve, making the relative effectiveness of numerical models, reasoning strategies, and intervention rules inherently time-varying. Consequently, a time series agent must adapt the forecasts it produces and the orchestration policy that determines which components to trust and how to coordinate them. The deployment process naturally provides supervision for this adaptation as forecast horizons elapse and realized targets reveal the effectiveness of earlier decisions. Committing all numerical expert forecasts and candidate agent paths before target observation allows each realized outcome to evaluate the entire alternative set, providing delayed feedback without additional annotation. However, existing time series agents primarily incorporate prior experience through forecast refinement, reflection, or retrieval, without systematically converting realized outcomes into persistent updates to the joint orchestration policy governing later origins. To exploit this delayed feedback systematically, we introduce TimEvolve, a frozen-backbone time series agent that converts each realized outcome into persistent joint updates of expert trust, agent path selection, and intervention strength. A temporally ordered predict, reveal, and update protocol applies this feedback to subsequent forecasts. Experiments across eight Time-MMD domains show that TimEvolve achieves the best average MSE and MAE ranks among fifteen methods and the lowest errors on both metrics in seven domains. These results demonstrate the value of learning forecasting policies from the futures encountered during deployment.
Innovation
Methods, ideas, or system contributions that make the work stand out.
Time Series Forecasting
Self-Evolving Policies
Delayed Feedback
Joint Updates
Agentic Time-Series
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