arXiv:2512.07624cs.LGcs.AI2025-12被引 1

用预训练时间序列模型预测流程演化,效果优于传统方法。

Time Series Foundation Models for Process Model Forecasting

  • 直接用预训练时间序列模型零样本预测流程变化
  • 相比传统模型,误差降低(MAE和RMSE更小)
  • 尤其适合数据少或复杂的流程预测任务

流程模型预测(PMF)旨在通过建模直接跟随(DF)关系的时间动态,预测流程控制流随时间的演变,补充了聚焦单个案例前缀的预测性流程监控。先前基准显示,机器学习与深度学习模型相比统计基线仅带来有限提升,主要由于DF时间序列的稀疏性和异质性。本文研究时间序列基础模型(TSFMs),即为通用时间序列设计的大规模预训练模型,作为PMF的替代方案。基于真实事件日志提取的DF时间序列,我们比较了无额外训练的零样本使用与在PMF特定数据上微调的变体。结果显示,TSFMs在相同日志上训练的传统及专用模型均表现出更低的预测误差(MAE和RMSE),表明非流程领域的时间结构可有效迁移。尽管微调可进一步提升精度,但增益通常较小,且在更小或更复杂的数据集上可能消失,因此零样本使用仍是强默认选择。本研究凸显了TSFMs在流程相关时间序列上的泛化能力与数据效率,并首次系统评估了时间基础模型在PMF中的应用。

原文摘要 · Abstract (English)

Process Model Forecasting (PMF) aims to predict how the control-flow structure of a process evolves over time by modeling the temporal dynamics of directly-follows (DF) relations, complementing predictive process monitoring that focuses on single-case prefixes. Prior benchmarks show that machine learning and deep learning models provide only modest gains over statistical baselines, mainly due to the sparsity and heterogeneity of the DF time series. We investigate Time Series Foundation Models (TSFMs), large pre-trained models for generic time series, as an alternative for PMF. Using DF time series derived from real-life event logs, we compare zero-shot use of TSFMs, without additional training, with fine-tuned variants adapted on PMF-specific data. TSFMs generally achieve lower forecasting errors (MAE and RMSE) than traditional and specialized models trained from scratch on the same logs, indicating effective transfer of temporal structure from non-process domains. While fine-tuning can further improve accuracy, the gains are often small and may disappear on smaller or more complex datasets, so zero-shot use remains a strong default. Our study highlights the generalization capability and data efficiency of TSFMs for process-related time series and, to the best of our knowledge, provides the first systematic evaluation of temporal foundation models for PMF.

时间序列流程预测预训练模型

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