A Quick Introduction to the Creo Behavioral Modeling Extension

Written By: Dave Martin

Let’s look at three common scenarios that cause engineers and designers to waste time and develop products that aren’t as good as they could be.

Iterating. You probably know that most designs start with design requirements. These may specify weight, volume, center of gravity, clearance, surface quality, motion, and even custom calculations. To find a solution that meets these requirements, you must often perform tedious and time-consuming iterations. To find an acceptable solution, you’ll modify a model, perform measurements, and then repeat… over and over and over again.

Iterating some more. Once you find a solution, the design must be optimized to find the best possible solution. If you design consumer electronics, how much would a 5 or 10% weight reduction translate to increased customer satisfaction? If you work in aerospace, what effect would that have on vehicle performance? For many products, lower weight means less materials, and therefore lower material costs.  Finding this “best possible design” requires substantial time and effort spent iterating and analyzing potential model solutions.

Making tradeoffs.  If you have conflicting and competing qualities that you’re designing toward, how do you perform trade studies? Can you generate high numbers of experiments and select the best results?

Introducing BMX


Why not let your CAD software find the answers for you?

The Creo Behavioral Modeling Extension (BMX) solves these three problems:

How does BMX accomplish this? With the following options:



Example of a Multi-Objective Design Study where we aim to increase Moment of Inertia while reducing mass.

With BMX, you build your design intent directly into your model. In fact, BMX is the ultimate in feature-based parametric modeling, because you create features in your model that ensure that changes to geometry will update the rest of your model so you meet your design constraints and goals.

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About the Author

Dave Martin

Dave Martin is a former Creo, Windchill, and Mathcad instructor and consultant. After leaving PTC, he was the Creo specialist for Amazon; and a mechanical engineer, Creo administrator, and Windchill administrator for Amazon Prime Air. He holds a degree in Mechanical Engineering from MIT and currently works as an avionics engineer for Blue Origin. 

Martin is the author of the books Design Intent in Creo Parametric and Top Down Design in Creo Parametric--both available at www.amazon.com. He can be reached at dmartin@creowindchill.com.