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<summary><h4>▶ Step 2: Upload Data Files</h4></summary>
Upload your formatted Excel (.xlsx) files below. For detailed formatting rules, see <strong>Tab 2: Input Setup</strong>.

  - **Scope File(s)**
  : Defines the validation scope in terms of factors (inputs) and responses (outputs). You can upload multiple files to assess different operational regions

  - **Model Data File**
  : Contains the model’s prediction data

  - **Referent Data File(s)**
  : Contains data from the validation referent(s) and interpolators (optional)

  - **(Optional) Interpolator Data File(s)**
  : Provides interpolator predictions to enable direct comparison between the model and interpolator where referent data is unavailable. Interpolator files should be uploaded alongside referent data files

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<h4>Step 3: Run MVL Calculation</h4>