# Order-to-Cash Reference models

> The **SAP Order-to-Cash Connector for AppOne** contains two standard reference models that describe the happy path of the process, the **Main process** and the **Down payment request** process.

## Introduction

The **SAP Order-to-Cash Connector for AppOne** contains two standard reference models that describe the happy path of the process, the **Main process** and the **Down payment request** process.

The existing processes can be verified against these predefined reference models.

In **AppOne** reference models can be viewed in the [Conformance - Reference model](https://docs.uipath.com/process-mining/standalone/2021.10/user-guide/menu-conformance#menu-conformance) dashboard.

:::note
The reference models represent the process executions in which only one document is created per type, i.e., one sales order item, one delivery item, etc.
:::

## Activities in the Reference model

Below is an overview of the activities that are taken into account in the reference models.

| Reference model | Activitites |
| --- | --- |
| Main process | Create SO item  Create delivery item  Post goods issue  Create invoice item  Create accounting document  Receive payment |
| Down payment request | Create SO item  Create down payment request item  Create accounting document  Receive payment  Create delivery item  Post goods issue  Create invoice item  Create invoice item*  Create accounting document  Receive payment  * The Create invoice item activity is executed twice in the process where a down payment request is involved. |