---
title: "Add calculation variables to calculation group"
slug: "add-calculation-variables-to-calculation-group"
description: "Learn how to add calculation variables to groups in project management for effective formula definition and scheduled units. Optimize your workflow today!"
tags: ["Task", "Project Control Suite", "PCS"]
updated: 2026-03-20T08:34:37Z
published: 2026-03-20T17:45:57Z
canonical: "docs.staedean.com/add-calculation-variables-to-calculation-group"
---

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

# Add calculation variables to calculation group

To each calculation group, add the calculation variables that you want to use:

- To define formulas.
- As scheduled unit.

### Steps

1. Go to **Project management and accounting** > **Setup** > **Advanced project management** > **Calculation groups**.
2. Click **Edit**.
3. Expand the **Variables** section.
4. Click **Add**.
5. In the list, mark the selected row.
6. Click **Add**.
7. Click **OK**.

> [!NOTE]
> **Note**
> 
> Consider filling in these fields:
> 
> - **Default value**: You can enter a default value for a variable. If you assign the calculation group to a work breakdown structure line, its variables with the default values are added as well.
> - **Is scheduled quantity**: If this check box is selected, the variable is the scheduled unit for the calculation group. If you assign the calculation group to a work breakdown structure line, this variable is the scheduled unit for the line. For each calculation group, you can only mark one variable as the scheduled unit.
> - **Unit**: You can link a variable to a unit. This is required if you use the variable in subcontracting

> [!NOTE]
> **Notes**
> 
> - Make sure you only add the variables that you want to use. All variables, as added to a calculation group are, for example, shown in the **Calculation** section on the **Work breakdown structure** form. And it makes no sense to have unused variables shown there.
> - If a calculation group is only used to define a scheduled unit, you only need to add one variable.
> - If you use progress billing, mark a variable as scheduled unit. For progress billing, usually, the scheduled unit variable is a percentage.
> - If you use subcontracting, mark a variable as scheduled unit, and define the unit as well. Reason: subcontracting uses purchase orders, and on the purchase lines a unit is required.