Maintain Time-Dependent Stock Levels
Application component: Fiori UI for Material Requirements Planning
App type: Transactional
Line of business: Supply Chain
Leading industry: Cross Industry
Solution capability: Material Requirements Planning (S/4)
Description:  With this app, you can maintain time-dependent stock levels for the safety stock that you want to hold for specific materials and plants within your area of responsibility. For each material, you can define validity intervals with different safety stock levels to adapt safety stock over time. This helps you dynamically react to varying demands, for example, if you expect a higher demand for a material during certain time periods, and reduce the risk of shortfalls by making sure materials are sufficiently stocked to meet the demands over specific periods of time. 
With this app, you can maintain time-dependent stock levels for the safety stock that you want to hold for specific materials and plants. For each material, you can define validity intervals with different safety stock levels to adapt safety stock over time. This helps you dynamically react to varying demands, for example, if you expect a higher demand for a material during certain time periods, and reduce the risk of shortfalls by making sure materials are sufficiently stocked to meet the demands over specific periods of time.
Key features:  You can search for specific materials based on different filter criteria, which you can define directly in the app or by using the settings for default values that are available from the user actions menu. Default filter values are automatically applied to all apps that reference them and support the default values option. For each material, you can then do the following:  Display time-dependent stock levels For each material, you can display time-dependent stock levels that have been defined by using this app or by using the API Time-Dependent Stock Levels (API_PROD_TIMEDPDNTSTCK_SRV).    Update time-dependent stock levels For materials where time-dependent stock levels have already been defined, you can update the parameter values specified for existing validity intervals in the future or create additional validity intervals with different values.   Create time-dependent stock levels For materials where time-dependent stock levels are not yet available, you can create validity intervals and specify the relevant parameters to define new stock levels as required. If validity intervals already exist, you can also define additional intervals. Validity intervals can be created for one selected material or for multiple materials at the same time. If you want to create multiple validity intervals, you can also upload a spreadsheet for one or more materials to create all required intervals in one step. All validity intervals that you create must start in the future.   Delete time-dependent stock levels For materials where time-dependent stock levels have already been defined, you can delete validity intervals that are no longer required. This only applies to intervals that have a preceding interval and start in the future.  Note If you create an interval that overlaps with an existing interval or if you delete an existing interval, the system automatically adapts the start and end dates of the preceding and subsequent intervals to make sure no gaps exist and stock levels can be uniquely determined at all times. If you delete an interval, the end date of the preceding interval is adapted to match the end date of the deleted interval. The following parameters are currently taken into account for processes in Material Requirements Planning, depending on the safety stock and target stock methods that are assigned to materials in MRP or in Production Planning and Detailed Scheduling (PP/DS), if advanced planning is enabled:  Safety Stock Specifies the safety stock that is required as a buffer to satisfy unexpected demands, which might occur within the validity interval. If the stock level falls below this value, procurement or production is triggered automatically to restore the buffer for the material. You can use this parameter for materials with the MRP safety stock method Time-Dependent Safety Stock  (MB) and materials with the PP/DS safety stock methods Safety Stock (MB) or Maximum of Safety Stock and Safety Days' Supply (MM).   Safety Days of Supply (Safety DOS) Specifies the number of daily requirements that is required as a buffer to satisfy unexpected demands, which might occur within the validity interval. Based on the safety DOS, the required buffer is recalculated on a daily basis. If the stock level falls below the buffer level that is determined from the safety DOS, procurement or production is triggered automatically and stock is filled up to the buffer level that is determined from the target DOS. You can use this parameter for materials with the MRP safety stock method Time-Dependent Days of Supply (MZ) and materials with the PP/DS safety stock methods Safety Days' Supply (MZ) or Maximum of Safety Stock and Safety Days' Supply (MM).   Target Days of Supply (Target DOS) Specifies the number of daily requirements that is defined as an ideal stock level of the material. Based on the target DOS, the ideal stock level is recalculated on a daily basis. When procurement or production is triggered automatically based on the safety DOS, the stock is filled up to the buffer level that is determined from the target DOS. You can use this parameter for materials with the MRP safety stock method Time-Dependent Days of Supply (MZ) and materials with the PP/DS safety stock method Target Days' Supply (Time-Dependent Maintenance) (1).   In addition to the parameters mentioned above, you can specify a reorder point, which indicates a need for replenishment of a selected material. You can also define validity intervals including safety days of supply and target days of supply values for materials where no safety stock or target stock method or a static safety or target stock method is assigned. However, both the reorder point and the days of supply values are then only used to determine how material shortages are displayed based on shortage definitions in the Monitor Material Coverage apps. They do not affect any processes in Material Requirements Planning and are not taken into account for the MRP run. For materials where advanced planning with Production Planning and Detailed Scheduling (PP/DS) is enabled and the target stock method Target Stock Level (Time-Dependent Maintenance) (2) is assigned, you can also specify a target stock. The target stock can be used in PP/DS planning and specifies the ideal stock level for a specific material. If you expect varying demands for a material during certain time periods, you can specify different target stock values for the validity intervals that you define. The maximum stock and maximum days of supply values are currently used for informational purposes only.  Note This app can be used instead of or as an addition to the available API Time-Dependent Stock Levels (API_PROD_TIMEDPDNTSTCK_SRV). This means time-dependent stock levels that are defined for a material using the API can be displayed and updated using this app while time-dependent stock levels created with this app can be displayed and updated using the API.  
Business roles: Production Planner| Material Planner - External Procurement
Production Planner : 
Plans, monitors and adjusts material supplies produced internally and ensures material availability for sales order fulfillment and production supply. Collaborates internally with customer care and other production planners.

Material Planner - External Procurement: (is an add-on role to the Material Planner)
Ensures the availability of materials for production supply plans and monitors and adjusts material supplies procured externally. Collaborates internally with production planners and externally with suppliers.