# How To Change Forecast Parameters

## Objective

Update the saved settings for a generated forecast and understand which values can change its results.

## Environment

- You have access to a generated forecast and permission to edit its parameters.
- You know the forecast dates, historical period, timezone, and interval your planning process should use.

## Resolution

1. Open the generated forecast and select **Parameters**. Review the saved configuration and the attached historical data summary before editing.
2. Select **Edit Parameters**. Review the editable settings: **Name** changes the forecast label but not its calculation; **Timezone** aligns dates and interval boundaries; **Forecast Period** sets the dates for which demand is calculated; **Forecast Interval** sets the size of each forecast time bucket, such as the 60-minute interval shown; **Historical Data Period** selects the dates used as forecast input; and **Historical Interval** sets the bucket size of that historical input. Choose a representative history and intervals that fit your planning needs, then save the changes.
3. Review the Parameters page again. **Data Points** is a count of available historical observations, not an editable setting. The **Historical Data Attached** panel summarizes the source date range, duration, record count, detected channel mappings, and interval. **Model Accuracy** reports a model result; it is not a parameter to edit.
4. Select **Rerun Forecast** when you want the forecast recalculated from the updated settings. Wait for the run to complete, then review the new forecast for the intended dates and timezone.
5. Review both **Inbound Volumes** and **Required Coverage** for the same date, queue, and channel scope. For guidance on reading these results, see [How To Review Forecast Outcomes](/help/articles/review-forecast-volume-and-staffing-requirements/).

If the new results will be used in a schedule or shared as a planning baseline, review the affected schedule and communicate the change to the planners who rely on it.

> Canonical page: https://zenops.cx/help/articles/change-forecast-parameters/
> Audience: For planners and managers
> Summary: Update a generated forecast’s settings and review the recalculated planning results.

## Notes on this article

### Important: A rerun can change planning results

After step 2 in resolution. After you save changes and rerun, forecasted volumes can differ from the results already calculated. Required coverage calculated from those volumes can change too. Review the new volumes and coverage, plus any schedules that rely on them, before using or publishing the updated plan.

## Visual references

- The Parameters tab shows the forecast period, timezone, intervals, historical data summary, and calculated model accuracy.: [Forecast Parameters page showing the forecast name, timezone, forecast and historical date ranges and intervals, data point count, model accuracy, and attached historical data summary.](https://zenops.cx/help/assets/forecast-parameters-overview.png)