Explanation
A release creation profile controls the aggregation of schedule line quantities in a delivery schedule, which determines how many releases are created for a scheduling agreement. You can enter a release creation profile in a purchasing info record, which is a source of supply for a material or service. A release creation profile also controls the periodicity of delivery schedule, which defines how often releases are created and transmitted to the vendor. References: SAP S/4HANA Sourcing and Procurement | SAP Learning, Course S4520, Unit 6, Lesson 1.

Explanation
Time-dependent conditions are conditions that have different values depending on the validity period. For example, you can have different prices or discounts for different time intervals within a contract or a scheduling agreement. You can configure the usage of time-dependent conditions for these two documents in Customizing for Materials Management under Purchasing -> Conditions -> Define Price Determination Process -> Define Schema Determination -> Determine Schema for Standard Purchase Orders -> Assign Schema Group to Purchasing Organization. References: SAP S/4HANA Sourcing and Procurement | SAP Learning, Course S4520, Unit 5, Lesson 1.

Explanation
You use an invoicing plan in this scenario. An invoicing plan is a method of creating invoicesautomatically at predefined intervals or dates without referring to any service entry sheets or goods receipts. You can use an invoicing plan for blanket purchase orders or contracts that have a fixed amount and validity period.
References: [SAP S/4HANA Sourcing and Procurement | SAP Learning], Course S4520, Unit 2, Lesson 1.

Explanation
Purchase-order-based invoice verification is a process of verifying and posting an invoice with reference to a purchase order. Some key features of this process are:
The system proposes the quantity to be invoiced as the difference between the total delivered quantity and the total quantity already invoiced. This ensures that you do not pay more than what you have received.
Partial deliveries for a purchase order item are NOT flagged as individual invoice items. This means that you can post one invoice for multiple partial deliveries of the same purchase order item. References:
[SAP S/4HANA Sourcing and Procurement | SAP Learning], Course S4515, Unit 1, Lesson 1.