In figure 3, workflow system includes three layers. User
interface layer describes user interface and user range.
Workflow operation layer describes workflow system
functions of each module. Data management layer describes
data classification. In accordance with the workflow
definition and model, workflow system designs and interacts
with user through multi-task display module, event module,
alarm and prompt module. Workflow system controls,
executes, applies workflow, and establishes five databases to
storage related data.