Beginners Guide to Model-Based Systems Engineering

12/18/2018

Block Definition Diagrams (BDDs)

• Represent the composition structure of blocks • Extend classic physical hierarchies with greater richness • Often include block roles and characteristics • Additional richness emphasizes design specifics • Best suited for system / software engineers and subject matter experts

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Key Semantics of Block Definition Diagrams

• Blocks (components) • Variable content to reflect information of greatest interest • Name • Values – key domain-dependent design parameters (weight, power, physical dimensions, speed, …) • Operations – externally visible activities (functions) performed by the block

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