Author: Mark Simons

MBSE: System Models, Executable Models, and More

When engineers speak about model-based systems engineering, or MBSE, the term “model” is used in many ways. Unfortunately, this only creates confusion between systems engineers, modeling and simulation engineers, and detail engineers. We all use models, so does this mean we’re now model-based? No. Remember that MBSE was devised as …

Systems Thinking: Schemas, Metamodels, and MBSE

“Metamodel” and “schema” are terms that get thrown around when we talk about systems and modeling of systems. But what do they really mean? “Meta” comes from the Greek and literally means “above” or “beyond,” but has also come to mean “about” or “of,” so a metamodel is a model …

Understanding Interfaces

We’re told risk is at the interface. But, the term “interface” conflates many ideas, and we often focus on the wrong problem. To correct that, we should consider three perspectives on connectivity: logical connectivity, physical connectivity, and behavioral connectivity. Allow me to demonstrate with an example of a multi-point message …