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The STAT COE Model Validation Level (MVL) tool computes an objective, automatable metric score (0–9) that quantifies the degree of trust that can be placed in a model’s results for a defined scope of intended use.
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<strong>The MVL framework evaluates validation across three pillars:</strong>
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<strong>Fidelity</strong>
: the level of consistency between a model and a referent. Conceptually, fidelity can be understood to be a quantitative comparison between model outputs and referent data.
<br><br><strong>Authority</strong>
:  refers to the strength of credibility of a referent’s claim to be a high-fidelity representation of reality. For validation to serve as a means for building trust in models, it must be based on a comparison of the model to authoritative referents.
<br><br><strong>Scope</strong>
: includes the set of inputs, outputs, assumptions, and limitations representing the mission-relevant system parameters, environmental conditions, constraints, and requirements, and their allowable values. The MVL framework considers three different scopes: the model scope, the referent scope, and the scope of intended use.

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<h3 style="margin-top:0;">Quick Start</h3>

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  <li>Go to <strong>Tab 3: Inputs</strong> to select the appropriate MVL approach and upload your formatted Excel (.xlsx) files:
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      <li>Scope file(s) defining factors (inputs) and responses (outputs)</li>
      <li>Model outputs data file</li>
      <li>Referent data file(s)</li>
      <li>(Optional) Interpolator file(s)</li>
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  <li>Run the MVL calculation at the bottom of <strong>Tab 3: Inputs</strong></li>
  <li>Go to <strong>Tab 4: Results</strong> to view outputs (Summary and Improvement tables) and interpretation guidance</li>
  <li>Need Help? Detailed file formatting guidance is provided in <strong>Tab 2: Input Setup</strong>, and all reference documents are in <strong>Tab 5: Links & References</strong></li>
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<h3 style="margin-top:0;">Disclaimer:</h3>
While every effort has been made to ensure the accuracy of this app, we DO NOT guarantee that this app is free from defects. This app is provided ‘as is’, and you use the app at your own risk. We make no warranties as to performance, merchantability, fitness for a particular purpose, or any other warranties whether expressed or implied. Under no circumstances shall we be liable for direct, indirect, special, incidental, or consequential damages resulting from the use, misuse, or inability to use this app.
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