How To Fix CN686 - Delivery date for a purchase requisition is unrealistic -> see log

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 686

• Message text: Delivery date for a purchase requisition is unrealistic -> see log

What causes this issue?

You have scheduled a network.

System Response

The delivery date for at least one purchase requisition is unrealistic.
In order to keep this delivery date, the purchase requisition would
have to be released in the past. The release date can be today at the
earliest.

How to fix this error?

Call up the scheduling log and check the dates of the relevant
components and their activities.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN686 - Delivery date for a purchase requisition is unrealistic -> see log ?

  The SAP error message CN686 indicates that the delivery date specified for a purchase requisition is considered unrealistic. This can occur for various reasons, such as the delivery date being too far in the future, not aligning with the production schedule, or being outside of acceptable lead times.
  Causes:
  
  Lead Time Issues: The delivery date may not account for the necessary lead time required for procurement or production.
  Calendar Settings: The delivery date may fall on a non-working day or outside of the defined working calendar.
  Material Availability: The material may not be available for the requested delivery date due to stock levels or production schedules.
  Incorrect Date Entry: The date may have been entered incorrectly, either manually or through a system error.
  Vendor Constraints: The vendor may have limitations on delivery dates based on their own production or shipping schedules.
  
  Solutions:
  
  Review and Adjust Delivery Date: Check the delivery date in the purchase requisition and adjust it to a more realistic timeframe based on lead times and vendor capabilities.
  Check Material Master Data: Ensure that the material master data is correctly set up, including lead times and availability checks.
  Consult the Log: The error message suggests checking the log for more details. This log can provide insights into why the date is considered unrealistic.
  Verify Vendor Information: Confirm with the vendor regarding their delivery capabilities and adjust the requisition accordingly.
  Update Working Calendar: Ensure that the working calendar is correctly configured to reflect non-working days and holidays.
  Use Planning Tools: Utilize SAP planning tools to forecast and plan for material requirements more accurately.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like ME53N (Display Purchase Requisition) to review the requisition details or ME21N (Create Purchase Order) to create a purchase order based on the requisition.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  Documentation: Refer to SAP documentation for guidelines on setting up lead times, working calendars, and material availability checks.
  
  By addressing the underlying causes and following the suggested solutions, you should be able to resolve the CN686 error and proceed with your procurement processes.