How To Fix QD258 - Valuation by control chart only allowed for fixed sample

SAP Error Message - Details

• Message type: E = Error

• Message class: QD - Message-Id. für Dynamisierung

• Message number: 258

• Message text: Valuation by control chart only allowed for fixed sample

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message QD258 - Valuation by control chart only allowed for fixed sample ?

  The SAP error message QD258, which states "Valuation by control chart only allowed for fixed sample," typically occurs in the context of quality management within SAP, particularly when dealing with control charts and sampling procedures.
  Cause:
  This error arises when you attempt to use a control chart for a sampling procedure that is not defined as a fixed sample. Control charts in SAP are designed to work with fixed sample sizes, meaning that the number of samples taken for each measurement is predetermined and consistent. If the sampling procedure is set to variable or if the sample size is not fixed, the system will trigger this error.
  Solution:
  To resolve the QD258 error, you can take the following steps:
  
  
  Check Sampling Procedure: 
  
  Go to the sampling procedure configuration in SAP (Transaction code: QP01).
  Ensure that the sampling procedure you are using is set to a fixed sample size. If it is set to variable, you will need to change it to a fixed sample.
  
  
  
  Adjust Control Chart Settings:
  
  If you are using a control chart, verify that it is configured correctly to work with fixed samples. You may need to create a new control chart or modify the existing one to ensure it aligns with the fixed sample requirement.
  
  
  
  Review Quality Inspection Plan:
  
  Check the quality inspection plan associated with the material or process. Ensure that the sampling procedure linked to the inspection plan is set to fixed sampling.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources related to quality management and control charts for additional guidance on setting up fixed sampling procedures.
  
  
  
  Testing:
  
  After making the necessary adjustments, test the process again to ensure that the error does not reoccur.
  
  
  
  Related Information:
  
  Control Charts: These are statistical tools used in quality management to monitor and control processes. They help in identifying variations and ensuring that processes remain within specified limits.
  Sampling Procedures: In quality management, sampling procedures define how samples are taken for inspection. Fixed sampling means a consistent number of samples are taken every time, while variable sampling allows for flexibility in the number of samples.
  SAP Quality Management (QM): This module in SAP is designed to manage quality processes, including inspections, quality control, and compliance with quality standards.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a consultant who specializes in SAP QM for further assistance.