用条件生成模型精准控制流程数据合成,支持特定场景模拟。
Generating the Traces You Need: A Conditional Generative Model for Process Mining Data
- 基于条件变分自编码器,根据流程与时间特征生成轨迹
- 生成的轨迹能准确还原子流程行为,满足控制流规则
- 适合用于罕见模式探索和'如果...会怎样'的仿真分析
近年来,流程挖掘中的轨迹生成成为重要挑战。深度学习模型虽能准确复现过程特征,但现有生成模型难以根据特定条件或属性调整生成分布。这一局限影响了对特定行为的关注、稀有模式的探索以及'假设性'情景的模拟。本文提出一种基于条件变分自编码器(CVAE)的流程数据生成模型,通过输入条件变量控制生成过程,实现对特定子流程的轨迹生成。该模型考虑流程数据的多视角特性及控制流约束,在保证数据多样性的前提下,精准生成符合条件的执行轨迹。生成结果采用通用生成模型评估指标及新增的条件生成质量指标进行验证。
原文摘要 · Abstract (English)
In recent years, trace generation has emerged as a significant challenge within the Process Mining community. Deep Learning (DL) models have demonstrated accuracy in reproducing the features of the selected processes. However, current DL generative models are limited in their ability to adapt the learned distributions to generate data samples based on specific conditions or attributes. This limitation is particularly significant because the ability to control the type of generated data can be beneficial in various contexts, enabling a focus on specific behaviours, exploration of infrequent patterns, or simulation of alternative 'what-if' scenarios. In this work, we address this challenge by introducing a conditional model for process data generation based on a conditional variational autoencoder (CVAE). Conditional models offer control over the generation process by tuning input conditional variables, enabling more targeted and controlled data generation. Unlike other domains, CVAE for process mining faces specific challenges due to the multiperspective nature of the data and the need to adhere to control-flow rules while ensuring data variability. Specifically, we focus on generating process executions conditioned on control flow and temporal features of the trace, allowing us to produce traces for specific, identified sub-processes. The generated traces are then evaluated using common metrics for generative model assessment, along with additional metrics to evaluate the quality of the conditional generation
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