A three stage procedure is used to form the basis for process development. The three parts of this model are as follows:
Strategic Process Model
Operational Process Model
Technical Process Model
The main objective of this three-stage model is to integrate IT departments with the rest of the business. This goal is best achieved when clear responsibilities within the process are defined and all stake-holders are involved and speak a "common language."
The Strategic Process Model
The primary target group of the strategic process model are process owners and process managers. In the early phases of process development, process participants and process analysts are also involved in the strategic process model. The strategic process model is intended to provide a basic, results-oriented representation of the process. The main goal of a strategic process model is to provide the fastest possible understanding of the process sequences while requiring no special knowledge of BPMN.
The strategic process model is developed from a high-level perspective without possible variations or errors. This error-free view of the process is also known as the "happy path."
The Operational Process Model
An operational process model is used to orient process participants to their daily work tasks. At this stage, a process analyst also analyzes the weaknesses of the process and begins designing improvements. The process analyst then uses the operational process model to develop a technical process model, which is given to the process engineer for further refinement and subsequent implementation in the real world.
The Technical Process Model
The objective of the technical process model is to refine the technical aspects of the process developed in the operational process model, allowing the process to run in a process engine. This level of the BPMN process can only be mapped directly as of BPMN 2.0.
Examples of the Three-Stage Procedure Models
The figures that follow show an example of the three-stage modelling process at work:

The figure shows an example of a strategic process model for a vacancy.

The figure shows the operational process model for this vacancy.

The figure now illustrates the technical process model for the business process vacancy.