How To Fix RU028 - Two operation times are not in ascending order

SAP Error Message - Details

• Message type: E = Error

• Message class: RU - Messages for order completion confirmation

• Message number: 028

• Message text: Two operation times are not in ascending order

What causes this issue?

You want to confirm times for an operation. Two of the times you have
entered are not in ascending order.
Example:
Start execution 16:00:00
Start processing 14:30:00 (on the same day)

How to fix this error?

Enter the times for the operation segments in ascending order.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RU028 - Two operation times are not in ascending order ?

  The SAP error message RU028, which states "Two operation times are not in ascending order," typically occurs in the context of production planning or routing in SAP. This error indicates that there is a problem with the sequence of operation times defined for a particular routing or production order. Specifically, it means that the start and finish times of operations are not set up correctly in a way that they follow a logical order.
  Cause:
  
  Incorrect Operation Times: The start time of a subsequent operation is set earlier than the finish time of a previous operation.
  Routing Configuration: The routing for a production order may have been incorrectly configured, leading to overlapping or out-of-sequence operations.
  Manual Entry Errors: During the creation or modification of operations, times may have been entered incorrectly.
  
  Solution:
  
  Review Operation Times: Check the operation times in the routing or production order. Ensure that the finish time of one operation is less than the start time of the next operation.
  Adjust Routing: If the routing is incorrect, modify the routing to ensure that all operations are in the correct sequence and that their times are logically ordered.
  Check for Overlaps: Ensure that there are no overlaps in operation times. Each operation should have a distinct time frame that does not conflict with others.
  Use Transaction Codes: You can use transaction codes like CA01 (Create Routing) or CA02 (Change Routing) to access and modify the routing details.
  Validate Changes: After making adjustments, validate the routing or production order to ensure that the error is resolved.
  
  Related Information:
  
  Routing: In SAP, routing defines the sequence of operations required to produce a product. Each operation can have specific times associated with it, including setup time, processing time, and teardown time.
  Production Orders: When creating production orders, the system checks the routing for any inconsistencies, including operation time sequences.
  SAP Documentation: Refer to SAP Help documentation for detailed information on routing and production order management, which can provide insights into best practices for setting up operations.
  
  By following these steps, you should be able to resolve the RU028 error and ensure that your operation times are correctly configured in SAP.