A Goods Receipt PO (GRPO) is the document in SAP Business One that records the physical receipt of goods into a warehouse. The primary and direct impact of posting a GRPO is the increase of the physical inventory count, which is reflected in the 'In-Stock' quantity field.

The 'Available' quantity (also known as Available-to-Promise or ATP) is a calculated value: Available = In-Stock - Committed + Ordered. Since this GRPO is created without a reference to a Purchase Order, the 'Ordered' quantity is not affected. The transaction increases the 'In-Stock' quantity, and with no change to the 'Committed' or 'Ordered' quantities, the 'Available' quantity consequently increases.

A. Increases the committed quantity

'Committed' quantity represents stock reserved for customers via open sales orders. A GRPO is an inbound purchasing transaction and does not affect customer commitments.

C. Decreases the ordered quantity

'Ordered' quantity is decreased only when a GRPO is created based on (i.e., by copying from) an open Purchase Order. The question explicitly states no PO is referenced.

1. SAP Business One 10.0 Help Portal - Goods Receipt PO Window:

Reference: In the section describing the functionality of the GRPO

it states

"Use this window to record goods that you receive from a vendor... When you create a goods receipt PO

SAP Business One receives the goods into the warehouse

and updates the quantities." This confirms the increase in 'In-Stock' quantity. The document also details the inventory effects of the transaction.

2. SAP Business One 10.0 Help Portal - General Tab: Item Master Data:

Reference: This document defines the inventory level fields. It specifies:

In Stock: "The current stock level of the item." A GRPO directly increases this.

Available: "The available quantity of an item... The calculation is based on the formula: In Stock Quantity + Ordered Quantity - Committed Quantity." This confirms that an increase in 'In-Stock' directly leads to an increase in 'Available' when other factors are constant.

3. SAP Training Course TB1200: SAP Business One - Logistics:

Reference: Unit 4: Purchasing – A/P

Lesson: Goods Receipt PO. This lesson explains that a GRPO is the key document for increasing inventory levels upon receipt of goods. It also clarifies that if a GRPO is not based on a PO

it is a standalone document that solely increases the 'In-Stock' quantity without affecting the 'Ordered' quantity.