**2. Gas turbine engines**

The typical aero-engine is designed in sectional-modular architecture type that can be assembled and disassembled, or even interchanged with modules from another compatible engine, without the need for specific retesting or balancing. This unique advantage supports production maintenance and reduces process downtime for the operator. The target to reduce emissions caused by conventional gas turbine engines in realization of the growing air transport demand drives research for new product architectures.

Previous work lacks the understanding on how interactions between components behave in varying modular platforms. Hence, it is important to know the dependency of each individual component (dependent, parallel, or coupled) in relation to the coordinated activities in the development lifecycle. **Figures 1**-**5** shows various gas turbine engine configurations and interconnected components.
