> ## Documentation Index
> Fetch the complete documentation index at: https://learn.nextedy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Example Models Reference

> Nextedy POWERSHEET ships with several example data models that demonstrate different use cases and configuration patterns.

export const LastReviewed = ({date}) => {
  if (!date) return null;
  const formatted = new Date(`${date}T00:00:00Z`).toLocaleDateString("en-US", {
    year: "numeric",
    month: "long",
    day: "numeric",
    timeZone: "UTC"
  });
  return <p className="mt-10 text-sm text-gray-400 dark:text-zinc-500 not-prose">
      Last reviewed on {formatted}
    </p>;
};

<Columns cols={3}>
  <Card title="RTM Model" icon="file" href="/powersheet/reference/example-models/rtm-model">
    Requirements Traceability Matrix model with multi-level hierarchy from user needs through design requirements.
  </Card>

  <Card title="Risk Management Model" icon="shield-exclamation" href="/powersheet/reference/example-models/risk-management-model">
    Risk analysis model with hazards, risk controls, and custom field storage for severity and probability.
  </Card>

  <Card title="Aerospace Safety Model" icon="file" href="/powersheet/reference/example-models/aerospace-safety">
    4-level requirements hierarchy for DO-178C / ARP 4754A certification with SC/CC classification, test case branches, and compliance formatters.
  </Card>

  <Card title="Medical Device RTM" icon="file" href="/powersheet/reference/example-models/medical-device-rtm">
    Component-scoped V-model traceability for ISO 14971 / IEC 62304 with validation and verification branches at each level.
  </Card>
</Columns>

<Tip title="Choosing an Example Model" />

## Model Comparison

| Model                                                                               | Entity Types                                              | Relationships               | Key Feature                          |
| ----------------------------------------------------------------------------------- | --------------------------------------------------------- | --------------------------- | ------------------------------------ |
| [RTM Model](/powersheet/reference/example-models/rtm-model)                         | 5+ (UserNeed, SystemRequirement, DesignRequirement, etc.) | Multi-level hierarchy       | Constraints, expansion paths         |
| [Risk Management Model](/powersheet/reference/example-models/risk-management-model) | Hazard, RiskControl, etc.                                 | Cross-domain linking        | Custom fields, enum properties       |
| [Aerospace Safety](/powersheet/reference/example-models/aerospace-safety)           | 7 (CustomerReq through FailureMode)                       | 4-level hierarchy with V\&V | SC/CC formatters, 5-state compliance |
| [Medical Device RTM](/powersheet/reference/example-models/medical-device-rtm)       | 3 (UserNeed, SystemReq, DesignReq)                        | V-model with V\&V branches  | Component scoping, YAML anchors      |

## Related Resources

* [Data Model Reference](/powersheet/reference/data-model/index) -- property-level reference for all data model YAML keys
* [Creating Your First Data Model](/powersheet/getting-started/first-data-model) -- step-by-step tutorial

<LastReviewed date="2026-07-02" />