How To Fix IP420 - Shift > 100% is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: IP - Messages for preventive maintenance

• Message number: 420

• Message text: Shift > 100% is not allowed

What causes this issue?

You have entered a shift factor of more than 100%.

System Response

The maximum possible value is 100%. The whole of the date variance
between planned date and actual date will be applied to the calculation
of the next call date in the case of a shift factor of 100%.

How to fix this error?

Correct your entry.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IP420 - Shift > 100% is not allowed ?

  The SAP error message "IP420 Shift > 100% is not allowed" typically occurs in the context of production planning and scheduling, particularly when dealing with capacity planning in the SAP system. This error indicates that the planned shift or utilization of a resource (like a machine or labor) exceeds 100%, which is not permissible.
  Cause:
  
  Over-allocation of Resources: The system is trying to allocate more work to a resource than it can handle. For example, if a machine is scheduled to operate for more than its available capacity (e.g., more than 8 hours in a day), it will trigger this error.
  Incorrect Shift Settings: The shift definitions in the system may not be set up correctly, leading to miscalculations of available capacity.
  Planning Parameters: The planning parameters or production orders may have been incorrectly defined, leading to unrealistic expectations of resource utilization.
  Data Entry Errors: Manual entries in production planning or scheduling that exceed the defined limits can also cause this error.
  
  Solution:
  
  Review Resource Capacity: Check the capacity settings for the resource in question. Ensure that the available capacity is correctly defined in the system.
  Adjust Production Orders: If a production order is causing the issue, consider adjusting the order quantity or the scheduling to fit within the available capacity.
  Modify Shift Definitions: Review and, if necessary, modify the shift definitions in the system to ensure they accurately reflect the working hours and capacity of the resources.
  Check Planning Parameters: Ensure that the planning parameters are set correctly and that they align with the actual production capabilities.
  Re-evaluate Scheduling: If the scheduling is too aggressive, consider spreading the workload over a longer period or adjusting the production schedule to avoid overloading resources.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CM01 (Capacity Planning) or COHV (Mass Processing of Production Orders) to analyze and adjust capacity and production orders.
  Capacity Planning: Familiarize yourself with the concepts of capacity planning in SAP, including how to define and manage work centers, shifts, and available capacity.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional insights or updates related to this error message.
  Training and Documentation: Consider reviewing SAP training materials or documentation related to production planning and capacity management to better understand how to avoid this error in the future.
  
  By addressing the underlying causes and making the necessary adjustments, you should be able to resolve the "IP420 Shift > 100% is not allowed" error in SAP.