Signal Usage Audit – MetaChain & Legend Project File

Description

Ever wonder whether all the signals in your SysML model are actually used — or if some are quietly rotting in your Signal Library?

This downloadable Cameo Systems Modeler project file accompanies the YouTube walkthrough and gives you a ready-to-use, repeatable method for auditing signal usage across your model using MetaChains, tables, and legends — without having to build everything from scratch.

What This Project File Demonstrates

This example model shows three distinct ways a Signal can be “used” in SysML:

• Signals typed by Flow Properties on Interface Blocks

• Signals used as Item Flows (signals placed directly on connectors)

• Signals referenced by Receptions

These results are then combined into a boolean array, processed through MetaChains, and visualized to clearly identify used vs. unused signals.

What You’ll Get

✔ A working Generic Table scoped to all Signals in the model
✔ Pre-built MetaChains to detect signal usage via:

• Flow Property typing

• Item Flow conveyance

• Reception → Signal relationships

• ✔ Logic to compute:

• Signal Used (boolean)

• Signal Not Used (boolean inversion)

✔ A Legend that visually highlights:

• 🟢 Used signals

• 🔴 Unused (dead) signal

✔ A practical reference for:

• MetaChain structure

• Property discovery (type, conveyed, signal)

• Model hygiene and validation techniques

Why This Matters

Dead or unused signals:

• Increase model noise

• Hide integration issues

• Undermine trust in your architecture

This project file gives you a scalable audit pattern you can reuse on real programs to:

• Validate interface completeness

• Enforce modeling discipline

• Improve long-term model maintainability

Who This Is For

• SysML practitioners using Cameo Systems Modeler / CATIA Magic

• MBSE engineers building interface-heavy models

• Anyone using tables, MetaChains, and legends for model validation

• Engineers who want working patterns, not just theory

File Details

• Format: Cameo Systems Modeler project file

• Delivery: Instant digital download

• Use Case: Learning reference + reusable modeling pattern

💡 Tip: Open the tables, MetaChains, and legend side-by-side with the YouTube video to follow along step-by-step — or reuse the pattern directly in your own models.