Developing a BPMN Model for the Conversion Process

Sunset Graphics Example

The chapter walks through how Sunset Graphics developed a BPMN model to document its conversion process. The example emphasizes that the process is internal, meaning no external participants are involved, so the model begins with production authorization activities.

Activity Model Overview

The model starts when inventory levels drop below a predefined threshold, triggering production. Production involves issuing materials to Work-in-Process (WIP), applying direct labor, and overhead tracking.

Using BPMN Pools and Lanes

The BPMN diagram illustrates the different responsibilities through swimlanes. For example, one lane is assigned to the inventory manager, and another to the employees performing the production activities.

Looping and Gateways in BPMN

A key feature of the model is the use of gateways to manage decision points. It showcases how unfinished batches loop back to earlier stages for further work, with checks for quality inspection. If errors are found, they are discarded, and new products are manufactured. The looping ensures the model reflects real-world iterations common in production processes​ .

This BPMN model not only documents the operational flow but also serves to identify areas for process improvement and potential control points, such as quality inspections.