You can select the following standard item categories inside a bill of material (BOM):

• Variable-size item: This item category is used for materials that have variable dimensions, such as pipes, wires, or fabrics. The system calculates the quantity of the variable-size item based on the formula and the dimensions entered in the BOM. You can also use the variable-size item to define a scrap percentage for the material.
• Non-stock item: This item category is used for materials that are not managed in inventory, such as consumables, services, or subcontracting items. The system does not create any reservations or stock movements for the non-stock item. You can use the non-stock item to trigger purchasing requisitions or purchase orders for the material. References: Bill of Material Item Category; Bills of Material in Production Planning

Lead time scheduling is a method of scheduling production orders that calculates the start and finish dates of each operation based on the operation duration, interoperation time, and other time elements. The time elements that are relevant for lead time scheduling of a production order are:

• Setup time: The time required to prepare the work center for the operation, such as changing tools, adjusting machines, or cleaning the work area.
• Processing time: The time required to perform the operation, such as machining, assembling, or testing the product.
• Teardown time: The time required to restore the work center to its original state after the operation, such as removing tools, resetting machines, or disposing of waste.
• Interoperation time: The time between two consecutive operations, such as transportation, waiting, or inspection time.
• Float before production: The time buffer before the scheduled start date of the production order, which can be used to compensate for delays or changes in the production plan.
• Float after production: The time buffer after the scheduled finish date of the production order, which can be used to compensate for delays or changes in the production plan.

The opening period and the total replenishment lead time are not relevant for lead time scheduling of a production order. The opening period is a parameter that defines the earliest possible start date of a production order, based on the material availability date and the planning time fence. The total replenishment lead time is a parameter that defines the total time required to procure or produce a material, from the time the requirement is identified until the time the material is available for use.

References: [Production Planning with SAP S/4HANA], pages 177-179; [SAP Help Portal: Lead Time Scheduling].

A scheduling agreement is a long-term agreement with a vendor for the supply of materials or services at predefined dates and quantities. To enable classic MRP to automatically create schedule lines in case of material shortage, you must do the following:

• Add the agreement to the source list and mark it for MRP relevance. The source list is a list of possible sources of supply for a material, such as vendors, contracts, or scheduling agreements. By adding the agreement to the source list and setting the MRP indicator, you specify that the agreement is a valid and preferred source of supply for the material.
• Set the creation indicator for delivery schedule lines on the initial screen of the MRP run. The creation indicator determines whether the MRP run creates procurement proposals, such as purchase requisitions, planned orders, or delivery schedule lines. By setting the creation indicator for delivery schedule lines, you instruct the MRP run to create schedule lines for the scheduling agreement, based on the material requirements and the agreement conditions.

Adding the agreement to the quota arrangement and marking it for MRP relevance is not necessary, as the quota arrangement is used to distribute the total requirements of a material among several sources of supply. Setting the creation indicator for purchase requisition on the initial screen of the MRP run is not correct, as the purchase requisition is a different type of procurement proposal than the delivery schedule line. References: Scheduling Agreement | SAP Help Portal, Source List | SAP Help Portal, MRP Run | SAP Help Portal.

Forecasting is the process of predicting future demand for products or services based on historical data, market trends, and other factors. Forecasting is an essential component of supply chain planning, which aims to optimize the flow of materials, information, andmoney across the supply chain network. SAP offers various applications that can be used for forecasting in supply chain planning, such as:

• Integration Business Planning (IBP): IBP is a cloud-based solution that provides end-to-end visibility and integration of planning processes across different business functions, such as sales, finance, operations, and logistics. IBP enables collaborative and real-time forecasting, scenario analysis, and decision making based on advanced analytics and machine learning. IBP supports various forecasting methods, such as statistical, causal, and demand sensing, and allows users to adjust and refine forecasts based on changing market conditions and business priorities12.
• Supply Chain Management (SCM): SCM is an on-premise solution that covers the entire supply chain process, from demand planning to delivery and invoicing. SCM includes various modules, such as Advanced Planning and Optimization (APO), Extended Warehouse Management (EWM), and Transportation Management ™, that enable efficient and flexible planning and execution of supply chain activities. SCM supports various forecasting techniques, such as exponential smoothing, trend analysis, and seasonal adjustment, and allows users to monitor and control forecast accuracy and performance34.

The other two options are not SAP applications, but rather concepts or processes related to supply chain planning:

• Capacity Requirement Planning (CRP): CRP is the process of determining the available and required capacity of resources, such as machines, labor, and materials, to meet the production plan. CRP helps to identify and resolve capacity bottlenecks, optimize resource utilization, and balance supply and demand. CRP can be performed using various SAP applications, such as MRP, Production Planning and Detailed Scheduling (PP/DS), or IBP5 .
• Material Requirement Planning (MRP): MRP is the process of calculating the quantity and timing of materials needed to fulfill the production plan. MRP helps to optimize inventory levels, reduce costs, and improve customer service. MRP can be performed using various SAP applications, such as ERP, SCM, or IBP . References: SAP Integrated Business Planning | SAP, Forecasting | SAP Help Portal, SAP Supply Chain Management | SAP, Forecasting | SAP Help Portal, Capacity Requirements Planning (PP-CRP) | SAP Help Portal, [Capacity Planning | SAP Help Portal], [Material Requirements Planning (PP-MRP) | SAP Help Portal], [Material Requirements Planning | SAP Help Portal]

 When you save a confirmation for a finished product in repetitive manufacturing, the system performs the following actions by default12:

• Posting of production costs to the production cost collector: The system calculates the actual costs for the confirmed quantity and posts them to the production cost collector assigned to the product. The production cost collector is a cost object that collects the costs for all confirmations of a product in a plant for a period.
• Posting of goods receipt for the product: The system posts the confirmed quantity as a goods receipt to the warehouse. The product is valuated at the standard price defined in the material master record. The difference between the standard price and the actual costs is posted to a price difference account.
• Reduction of associated capacity requirements: The system reduces the capacity requirements for the work center where the confirmation was made. The capacity requirements are calculated based on the confirmed quantity and the standard values for setup, machine, and labor time in the routing. References: 1: Repetitive Manufacturing Confirmation | SAP Help Portal(https://help.sap.com/docs/SAP_S4HANA_ON-PREMISE/ee6ff9b281d8448f96b4fe6c89f2bdc8/66dd7fc2d4ac4a53b51f300a04ae24ac.html)2: Confirming Production in Repetitive Manufacturing | SAP Help Portal(https://help.sap.com/docs/SAP_S4HANA_ON-PREMISE/f899ce30af9044299d573ea30b533f1c/9231f9504a62eb5ee10000000a44538d.html).

The duration of an operation for production is determined by the combination of data maintained in the routing and the work center. The routing defines the sequence of operations, the work centers, and the standard values for each operation, such as setup time, processing time, and teardown time. The work center defines the capacity, the formulas, and the scheduling parameters for each operation, such as base quantity, operation rate, and queue time. The system calculates the duration of an operation by multiplying the standard values from the routing by the factors from the work center formulas and adding the scheduling parameters from the work center. For example, if the routing specifies a processing time of 10 minutes per unit and the work center formula is processing time = (processing time / base quantity) * operation quantity, and the base quantity is 100 units, then the duration of the operation for 50 units is (10 / 100) * 50 = 5 minutes.

The bill of material (BOM) © and the material master (D) are not data objects that determine the duration of an operation for production. The BOM defines the components and the quantities that are required for producing a material. The material master defines the general and specific attributes of a material, such as the material type, the unit of measure,the MRP data, and the production data. These data objects are relevant for planning the material requirements and the production costs, but not the operation duration. References:

https://help.sap.com/docs/SAP_S4HANA_ON-PREMISE/c00ad2cac7be4ef29a4461ba114e4f91/051ebf53d25ab64ce10000000a174cb4.html

https://learning.sap.com/learning-journeys/manage-production-orders-in-sap-s-4hana-manufacturing/scheduling-production-orders_cc390d5f-b87c-4c4d-9472-8bb10ea4f476

You can exclude a material from the MRP run by using a specific material status or a specific MRP type. A material status is a user-defined indicator that can be assigned to a material master record to control the procurement and planning activities for the material. For example, you can define a material status that blocks the material from being planned by MRP. An MRP type is a parameter that defines how a material is planned by MRP. For example, you can use the MRP type ND (No Planning) to exclude the material from the MRP run.

References: [SAP S/4HANA Production Planning and Manufacturing Certification Guide], page 87; [SAP Help Portal: Material Status] and [SAP Help Portal: MRP Type].

The Advanced Planning flag is a field that indicates whether a data object is relevant for planning with Production Planning and Detailed Scheduling (PP/DS) in SAP S/4HANA. PP/DS is a component of Advanced Planning that provides more precise and flexible planning capabilities for critical products and resources. You can set the Advanced Planning flag for the following data objects:

• Work Center: This is a master data object that represents a location where operations are performed. A work center can have different capacities, such as machine, labor, or power, that are used for scheduling and capacity planning. You can set the Advanced Planning flag for a work center to enable it for PP/DS planning. This means that the work center can be used as a resource in PP/DS and its capacity can be optimized by PP/DS heuristics or optimization tools.
• Material: This is a master data object that represents a product or a component that is produced, procured, or consumed in a business process. A material can have different views, such as basic data, MRP, sales, or production, that contain different attributes and parameters for planning and execution. You can set the Advanced Planning flag for a material to enable it for PP/DS planning. This means that the material can be planned with exact times and quantities in PP/DS and its availability can be checked by PP/DS pegging.

The production version (B) and the plant (D) are not data objects that can have the Advanced Planning flag. The production version is a master data object that defines the combination of a bill of material (BOM) and a routing or a production process model (PPM) for a material. The production version does not have a separate flag for PP/DS, but it inherits the flag from the material and the work center. The plant is an organizational unit that represents a physical location where materials are produced or stored. The plant does not have a flag for PP/DS, but it is assigned to a location in PP/DS that represents the geographical or logical grouping of plants for planning purposes. References:https://blogs.sap.com/2018/02/12/ppds-for-sap-s4hana-advanced-planning-a-powerful-planning-and-scheduling-tool/

https://learning.sap.com/learning-journeys/explore-integrated-business-processes-in-sap-s-4hana-/advanced-planning_ae824eb6-4bf8-4720-a48f-ba86929a14de

A material availability check can be triggered automatically for a production order by the following methods:

• By mass processing: You can use the mass processing function to execute material availability checks for multiple production orders at once. You can use the Manage Production Orders app or the transaction COHV to perform mass processing. You can define the selection criteria and the scope of check for the orders to be checked. The system updates the availability status and the committed quantities for the checked orders.
• By order release: You can configure the system to trigger a material availability check automatically when a production order is released. You can use the Customizing activity Define Checking Control to define the checking rule and the scope of check for the order release. The system updates the availability status and the committed quantities for the released order. References: Executing Material Availability Checks; [SAP S/4HANA Production Planning and Manufacturing Certification Guide], page 83.

The order-type-dependent parameters are configuration settings that control various aspects of production order processing, such as number range, scheduling type, availability check, costing variant, confirmation parameters, and so on. These parameters are assigned to a production order type, which is a key that defines the characteristics and business rules of a production order. The order-type-dependent parameters affect the following business processes:

• Check material availability: The availability check determines whether the required materials and capacities are available for the production order. The availability check is controlled by the checking rule and the checking group, which are defined in the order-type-dependent parameters. The checking rule specifies which stocks, receipts, and issues are considered in the availability check. The checking group determines how the system responds to the availability situation, such as issuing a warning or an error message, or rescheduling the order.
• Schedule production orders: The scheduling of production orders calculates the planned dates and times for the operations and the order. The scheduling is controlled by thescheduling type and the scheduling parameters, which are defined in the order-type-dependent parameters. The scheduling type determines whether the system performs forward or backward scheduling, and whether it considers the basic dates or the production dates. The scheduling parameters determine how the system calculates the operation durations, interoperation times, and floats. References: [SAP S/4HANA Production Planning and Manufacturing Certification Guide], page 123; [SAP Help Portal: Order-Type-Dependent Parameters].

A resource network is a business object in PP/DS that defines the allowed directed connections between two or more resources. A directed connection means that the connection from Resource 1 to Resource 2 is not the same as the inverse connection from Resource 2 to Resource 1. You use this object to model existing production constraints more precisely, with the objective of creating a finite and technically feasible production schedule. Resource networks simplify the modeling of resource restrictions for consecutive operations or orders1

A resource selection is a business object in PP/DS that defines the criteria for selecting a suitable resource for an operation or an order. You use this object to specify the characteristics, attributes, and capacities of the resources that can be used for a particular production process. Resource selection allows you to optimize the resource utilization and reduce the setup times and costs2

A resource matrix is a business object in PP/DS that defines the relationships between different resources based on their characteristics and attributes. You use this object to determine the setup times and costs for changing from one resource to another. Resource matrix allows you to model the setup effort and expense more accurately and improve the production efficiency3

A resource hierarchy is a business object in PP/DS that defines the structure and sequence of resources that are used for a production process. You use this object to represent the logical and physical dependencies of the resources and to control the scheduling and sequencing of the operations or orders. Resource hierarchy allows you to model the production flow and capacity more realistically and ensure the technical feasibility of the production plan.

References:

• Resource Network | SAP Help Portal
• Resource Selection | SAP Help Portal
• Resource Matrix | SAP Help Portal
• [Resource Hierarchy | SAP Help Portal]

The material type is a key attribute that classifies materials according to their characteristics and determines how they are processed in the system. The material type influences the following aspects of material management:

• Which material master screens appear and in which sequence: The material type controls which fields are required, optional, or hidden in the material master record. It also determines the order in which the screens are displayed when creating or changing a material master record. Different material types may have different views and fields depending on the business requirements. For example, a raw material may have a purchasing view, while a finished product may have a sales view.
• Whether the material is produced in-house, procured externally, or both: The material type defines the procurement type of the material, which indicates how the material is procured. The procurement type can be in-house production, external procurement, or both. The procurement type affects the planning and execution of the material requirements. For example, a material with in-house production procurement type will generate planned orders, while a material with external procurement type will generate purchase requisitions or schedule lines.

The material type does not influence the following aspects of material management:

• Which document types and class categories are allowed: The document type is a key attribute that classifies documents according to their business purpose and determines how they are processed in the system. The document type controls the number range, field selection, and status profile of the document. The document type is independent of the material type and can be used for any material type. For example, a purchase order document type can be used for any material type that is procured externally. The class category is a key attribute that classifies classes according to their application area and determines how they are processed in the system. The class category controls the characteristics, object types, and inheritance rules of the class. The class category is independent of the material type and can be used for any material type. For example, a material class category can be used for any material type that has characteristics.
• Which plant-specific and plant-independent statuses are allowed: The status is an attribute that indicates the current condition of an object in the system. The status can be plant-specific or plant-independent, depending on whether it applies to a specific plant or to all plants. The status is independent of the material type and can be used for any material type. For example, a material can have a plant-specific status of blocked for quality reasons, or a plant-independent status of discontinued. References: Material Type | SAP Help Portal, Material Master (LO-MD-MM) | SAP Help Portal, Document Types | SAP Help Portal, [Class Category | SAP Help Portal], [Status Management | SAP Help Portal]

The tabular planning table for capacity planning provides two chart types: the capacity requirements chart and the work center capacities chart. The capacity requirements chart displays the capacity requirements for one or more orders, grouped by order, operation, or work center. The work center capacities chart displays the available capacity and the capacity requirements for one or more work centers, grouped by work center, capacity category, or shift sequence. You can switch between these chart types using the menu options Settings -> Chart type. References: Planning Table (tabular form), Capacity planning table

A reduction strategy is a method of shortening the lead time of an order by reducingcertain time elements in the order scheduling1. The time elements that can be reduced by a reduction strategy are move time, wait time, and queue time2. Move time is the time required to move a material from one operation to another. Wait time is the time between the end of an operation and the start of the next operation. Queue time is the time before an operation can start at a work center due to the work center’s capacity utilization3. These time elements can be reduced by a percentage or a fixed value in the reduction strategy. References: 1: Reduction Strategy | SAP Help Portal(https://blog.sap-press.com/4-strategies-for-make-to-stock-production-with-sap-s4hana) 2: 4 Strategies for Make-to-Stock Production with SAP S/4HANA(https://blogs.sap.com/2022/03/22/highlights-for-manufacturing-in-sap-s-4hana-2021-part-2-production-planning-engineering-operations/) 3: Scheduling | SAP Help Portal(https://blogs.sap.com/2022/04/26/manufacturing-in-sap-s-4hana-cloud-planning-strategies/).