Editing Driver Time Series

This article explains how to edit driver time series in Model Reef.

You will learn:

  • Where to change driver values.

  • How manual edits interact with imports and presets.

  • How to keep driver edits auditable.

Driver time series are core assumptions that many variables depend on, so edits should be deliberate and traceable.


1

Where to edit driver series

You edit driver values in:

  • The Driver Editor grid for that driver.

  • Sometimes in the Data Library, if you are editing an entry that is treated as a driver.

If the series is read only, it may be fully controlled by imports or restricted logic.

2

Editing individual periods

To change a single period:

  • Open the Driver Editor.

  • Click the cell for the period you want to edit.

  • Type the new value and press Enter.

The driver updates and all linked variables will recalculate automatically.

3

Editing ranges of periods

You can adjust ranges by:

  • Copying and pasting values across multiple periods.

  • Using fill tools where supported.

  • Pasting blocks of values from an external spreadsheet.

This is useful when you have a planned path for prices, volumes or growth that you want to drop in as a block.

4

Interaction with imports and presets

If the driver is partly or fully imported:

  • Historical segments may be read only if they are tied to external systems.

  • Forecast segments may remain editable, allowing you to adjust the forward path.

If the driver is controlled by a preset:

  • Some presets allow manual overrides of the resulting series.

  • Others lock the series, requiring changes at the preset parameter level instead.

The editor will indicate which cells are editable.

5

Keeping driver edits auditable

Because driver changes can affect many variables:

  • Use notes to explain significant edits or structural changes in the time series.

  • Tag important drivers so they appear in review workflows.

  • Avoid making major changes without recording why they were made.

This helps reviewers and future you understand how the model evolved.


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