Time performance evaluation approach in workflow models;

New algorithm for mining workflow models;

New user-oriented workflow model;

This paper discusses application and implementation method of workflow technology in production planning system based on Web (B/S and C/S structure), analyses production schedule procedure and workflow models using figures of the direction and Petri Nets; finally, analyses system structure of production planning system and function module from the angle of The system realization Under .

This paper gives analytic method to analyze the performance of a kind of workflow models that can be nested by four basic workflow models,i.

The study of workflow modeling mainly concerns the way to express clearly and accurately business process within actual application and especially the way to formalizing.

Aiming at such problemsas inadequate modeling ability,weak adaptability,and dependency of domain existed in current workflow management systems,a new workflow modeling method based on extended Unified Modeling Language activity diagrams and XML Process Definition Language(XPDL) specifications,was put forward.

It consists of clustering static security model, dynamic security model based on Petri net, hierachical distributed security model and default security model.