How To Fix CY728 - Order & operation &: Minimum overlap with predecessor & not achieved

SAP Error Message - Details

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 728

• Message text: Order & operation &: Minimum overlap with predecessor & not achieved

What causes this issue?

On dispatching an operation the system does not adhere to the minimum
overlap time with the preceding operation. There was insufficient
available capacity at the desired time.

How to fix this error?

Increase the available capacity in the time interval in question or
reschedule the preceding operation.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CY728 - Order & operation &: Minimum overlap with predecessor & not achieved ?

  The SAP error message CY728 ("Order & operation &: Minimum overlap with predecessor & not achieved") typically occurs in the context of production planning and scheduling within SAP's Advanced Planning and Optimization (APO) or Production Planning (PP) modules. This error indicates that the scheduling of an operation does not meet the required minimum overlap with its predecessor operation.
  Cause:
  
  
  Scheduling Constraints: The operation you are trying to schedule has a defined minimum overlap with its predecessor operation, which is not being met. This can happen if:
  
  The start time of the current operation is too far in the future compared to the end time of the predecessor operation.
  The duration of the predecessor operation is longer than expected, causing a scheduling conflict.
  
  
  
  Configuration Settings: The minimum overlap requirement may be set in the routing or in the production version for the material. If the overlap is not configured correctly, it can lead to this error.
  
  
  Resource Availability: If the resources required for the operation are not available at the time needed, it can also lead to scheduling issues.
  
  
  Solution:
  
  
  Adjust Scheduling: Review the scheduling of the operations and adjust the start times to ensure that the minimum overlap requirement is met. You may need to:
  
  Shorten the duration of the predecessor operation if possible.
  Change the start time of the current operation to ensure it starts within the required overlap period.
  
  
  
  Review Routing and Production Version: Check the routing and production version settings for the material to ensure that the minimum overlap is set correctly. If necessary, adjust the overlap settings to better fit your production process.
  
  
  Resource Planning: Ensure that the resources required for the operations are available and scheduled correctly. If there are resource constraints, consider rescheduling or reallocating resources.
  
  
  Use of Scheduling Tools: Utilize SAP's scheduling tools to analyze and optimize the production schedule. Tools like the Capacity Planning or the Detailed Scheduling can help identify and resolve scheduling conflicts.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CO02 (Change Production Order) or CM21 (Capacity Leveling) to review and adjust production orders and schedules.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  Documentation: Refer to SAP documentation on production scheduling and routing to understand how to configure overlaps and other scheduling parameters effectively.
  
  By addressing the scheduling conflicts and ensuring that the minimum overlap requirements are met, you should be able to resolve the CY728 error message.