---
title: "Forecasting Dimensions (Splits)"
slug: "forecasting-dimensions-splits"
updated: 2026-04-01T23:09:37Z
published: 2026-04-01T23:09:37Z
---

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

# Forecasting Dimensions (Splits)

You can specify what to show in a forecasting report with Dimensions. Dimensions determine how to split the report:

- **TAP Impressions**: **Position**is the default. You can include up to 2 more **Dimensions**.
- **TAP Spots**: Only one dimension, **Station**.
- **TAP Reach Extension**: **Inventory Owner** is the default. You can include up to 2 more **Dimensions**.

## Select Dimensions

![](https://cdn.document360.io/7124b381-0a94-401a-abbd-9df9c4ea5dff/Images/Documentation/Report-forecasting-splits.png)

To change the default dimension, select it and then select a different one from the **Edit Split**panel. To include another dimension, click **Add New** in the **Dimensions** section to open the **Create New Split** panel on the right. Choose a dimension from the list and click **Save.**

## Dimension Order

The order in which you include dimensions affects how the data is presented. The report shows avails split by the first dimension and further split by the next dimensions.

The following examples show a **TAP Impressions** report with **Filters**for pre-roll and mid-roll positions for two station/podcasts and the iOS and Android operating systems with **Dimensions**for **Position**, **Station**, and **Operating System**.

### Example: Position > Station > Operating System

![](https://cdn.document360.io/7124b381-0a94-401a-abbd-9df9c4ea5dff/Images/Documentation/image-1684414563765.png)

1. All mid-roll inventory.
2. Mid-roll inventory for this podcast.
3. Mid-roll iOS inventory for this podcast.
4. All pre-roll inventory.
5. Pre-roll inventory for this podcast.
6. Pre-roll iOS inventory for this podcast.

### Example: Position > Operating System > Station

![](https://cdn.document360.io/7124b381-0a94-401a-abbd-9df9c4ea5dff/Images/Documentation/image-1684414596316.png)

1. All mid-roll inventory.
2. Mid-roll iOS inventory.
3. Mid-roll iOS inventory for this podcast.
4. All pre-roll inventory.
5. Pre-roll iOS inventory.
6. Pre-roll iOS inventory for this podcast.