Create Purchase Order Centrally
Application component: Processing Purchase Requisitions centrally
App type: Transactional
Line of business: Sourcing and Procurement
Leading industry: Cross Industry
Solution capability: Central Requisitioning (S/4, Ariba Ctrl Proc.)
Description:  With this app, you can create purchase orders with reference to purchase requisition items. You can create the purchase orders in the SAP S/4HANA hub system, or in the connected systems, depending on where the purchase requisitions were created initially. You can navigate to this app only using the Process Purchase Requisitions Centrally app. In addition, note that you can use this app only if the Central Purchasing scenario in Central Procurement is active. 
This app is used to display the purchase orders to be created for the selected purchase requisition from manage purchase requisition centrally application. This application shall only be accessible from Manage Purchase requisition centrally app
Key features:  You can use this app to:   Create purchase orders The selected purchase requisition items are grouped based on information associated with them, such as supplier, company code, purchasing organization, purchasing group, and connected system. This grouping results in the creation of one or several purchase orders. When creating purchase orders, you have the following options:   Order purchase orders directly You can use this option when you don't want to add further details in the purchase order or change existing purchase order information that is available from the selected purchase requisitions.   On the header level, you can enter information about the purchase order, such as the document type, payment terms, incoterms, and incoterms location using the input fields. On the item level, there are fields to help you enter information about the material description, quantity, price, tax code, and the delivery date, as well a goods receipt option.Note If the connected system is a non-SAP system, the value help for these fields is generated from the non-SAP connected system dynamically.The information you enter in these fields will only be applied to the purchase order if you select the Order or Save with Status Held option. The information maintained in these fields will not be applied to the purchase order if you are creating it using the Process in Expert Mode option.   Save purchase orders with the status Held You can hold a purchase order if you want to add further details in the purchase order before placing an order.   Create purchase orders using the expert mode You can use this option if you want to add further details in the purchase order or change existing purchase order information that is available from the selected purchase requisitions. To do so, choose Process in Expert Mode that opens the Manage Purchase Orders app in the respective connected system. For non - SAP S/4HANA connected systems, you can create purchase orders in the SAP GUI for HTML transaction of the respective connected system.     Remove purchase requisition items when creating a purchase order You can do so, for example, when the purchase requisition items you are using to create purchase orders contain errors.   Display purchase order details in the respective connected system After you create purchase orders using the options Order or Save with Status Held, click the purchase order number to navigate to the Manage Purchase Orders app to view the details. For non - SAP S/4HANA connected systems, you can view the purchase order details in the SAP GUI for HTML transaction of the respective connected system.   Note   You can activate Central Purchasing scenario in Customizing for Central Procurement under Materials Management  Purchasing  Central Procurement - Settings in Hub System  Activate SAP S/4HANA Procurement Hub and Scenarios.   You can also create purchase orders from central purchase requisitions that are processed in the hub system. Such purchase requisitions are created in the context of Central Purchase Requisition Processing scenario. From the hub system, central purchasers can trigger a conversion of central purchase requisitions to purchase orders without replicating the purchase requisition instance into the connected systems.    
Business roles: Purchaser - Central Procurement
Purchaser - Central Procurement : 
Carries out any centralized purchasing activities across a customer's multi-ERP procurement landscape from a single, central procurement hub, including demand aggregation, centralized sourcing activities and negotiation of central contracts.

Purchaser : 
Ensures that demands of materials and services are fulfilled by creating and monitoring purchase orders.