Impacts of Factory calendar reassignment to plant in OX10 on MM/PP/SD activities

In SAP, a factory calendar plays a crucial role in scheduling and planning activities in the Materials Management (MM), Production Planning (PP), and Sales and Distribution (SD) modules. When you reassign a different factory calendar to a plant using transaction OX10, it can have significant implications on various activities in these modules:

Materials Management (MM):

Procurement and Purchasing: The factory calendar defines working days and holidays for the plant. When you change the factory calendar, it affects lead times for procurement and purchasing processes. For example, if you change the calendar to include more working days, the lead time for receiving materials may be reduced, impacting reorder points and safety stock levels.

Inventory Management:

Changes to the factory calendar can affect inventory management. If you add more working days, you may need to adjust reorder points, reorder quantities, and safety stock levels to match the new calendar.

Material Requirement Planning (MRP):

MRP calculations take into account the factory calendar to determine when materials are needed. Changing the factory calendar can impact the MRP run results, potentially leading to different order recommendations and schedules.

Production Planning (PP):

Work Scheduling: Factory calendars are used to schedule production orders, work centers, and capacity requirements. Changing the factory calendar can affect the production schedule and capacity planning. For example, if you add more working days, production lead times may be reduced, allowing for more efficient production planning.

Capacity Requirements Planning (CRP):

Capacity planning relies on the factory calendar to determine available working time. A change in the factory calendar can impact capacity requirements and scheduling in the CRP process.
Shop Floor Execution: Changes to the factory calendar can affect shop floor activities and the production workforce. Scheduling changes may require adjustments to labor and resource planning.

Sales and Distribution (SD):

Delivery Schedules: The factory calendar can impact delivery schedules and lead times for customers. If you change the calendar to include more working days, customers may receive their orders faster.
Order Promising: Factory calendars are used in order promising to provide realistic delivery dates to customers. Changing the calendar can affect the availability and commitment of products to customers.

Shipping and Transportation:

Altered factory calendars can affect shipping and transportation schedules. You may need to adjust transportation planning, carriers, and delivery windows to accommodate the new working days.