---
alias: user-guide-join-maintenance-activity-order
tags:
- maintenance
description: "Initiate the process of combining Maintenance Activity Orders with a parent order"
---

# Join Maintenance Activity Orders

:lock: MaintenanceActivityOrder.**Join**

## Overview

This operations is used to join one or more **Maintenance Activity Orders** (**MAOs**) with a Parent **MAO**. When a **MAO** is joined with a Parent, only the Parent needs to be performed. After the Parent is completed, both the Parent and the included **MAO** are scheduled by the system.

## Preconditions

* All **MAOs** to be joined (both Parent and Child):
    * Are Active and in one of these execution states: Requested, Approved or Released.
    * Belong to the same **Maintenance Plan Instance**.
    * Have the same schedule type, which must be one of the following: Usage Based, Time Based or Time And Usage Based.
    * Do not have the Maintenance Type set to Qualification.
    * The relationship from Parent **MAO** and Children **MAO** exists in the effective **Maintenance Plan**.
* The Parent **MAO** must not be already included in another **MAO**.
* The user must belong to the **Maintenance Plan Instance** Owner Role.

## Sequence of Steps

### Step 1

1. Select all the **MAOs** to be joined with the Parent **MAO**.
2. Optionally, enter a Comment.
3. Select **Join** to complete the operation.

![Join MAOs](images/join_maintenance_activity_order.png)