To prevent certain materials that belong to a material group from being ordered with reference to a contract item, you can use the following method:

Create material-specific source lists for the contract item and set the Fix indicator, which means that you specify the materials that are allowed to be ordered with reference to the contract item and make them mandatory. Reference:SAP S/4HANA Sourcing and Procurement | SAP Learning, Course S4520, Unit 2, Lesson 1.

To enable the ability to personalize the home page, you must configure it in the SAP Fiori launchpad. The SAP Fiori launchpad is a role-based, personalized, and real-time access point for SAP applications and services. You can configure the personalization settings for the home page in Customizing under SAP Fiori -> Launchpad -> Personalization Settings. Reference:SAP S/4HANA Sourcing and Procurement | SAP Learning, Course S4500, Unit 1, Lesson 1.

SAP Smart Business is a framework that provides real-time insights into key performance indicators (KPIs) and allows users to take actions based on the data. Some SAP Smart Business KPIs available for purchase requisitions are:

Purchase requisition-to-order cycle time, which measures the average time from the creation of a purchase requisition to the creation of a purchase order.

Overdue purchase requisitions, which shows the number and value of purchase requisitions that have not been converted to purchase orders by their delivery date.

Purchase requisition average approval time, which measures the average time from the submission of a purchase requisition to its approval or rejection. Reference:SAP S/4HANA Sourcing and Procurement | SAP Learning, Course S4520, Unit 8, Lesson 1.

The Freeze Book Inventory indicator in a physical inventory document header fixes the book inventory in the physical inventory document at the beginning of the count. This means that any goods movements that occur after the count date are not reflected in the book inventory quantity. Reference:SAP S/4HANA Sourcing and Procurement | SAP Learning, Course S4510, Unit 5, Lesson 1.