How To Fix /SAPAPO/PFCS_MESS186 - Product/Location &1/&2&3: Calculation of std dev. not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/PFCS_MESS -

• Message number: 186

• Message text: Product/Location &1/&2&3: Calculation of std dev. not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/PFCS_MESS186 - Product/Location &1/&2&3: Calculation of std dev. not possible ?

  The SAP error message /SAPAPO/PFCS_MESS186 indicates that there is an issue with the calculation of the standard deviation for a specific product/location combination in the SAP Advanced Planning and Optimization (APO) module. This error typically arises during the planning process when the system attempts to calculate statistical data for forecasting or planning purposes.
  Cause:
  The error can be caused by several factors, including:
  
  
  Insufficient Historical Data: There may not be enough historical data available for the product/location combination to calculate the standard deviation. This is often the case for new products or products with irregular sales patterns.
  
  
  Data Quality Issues: There may be missing or inconsistent data in the historical records, which can prevent the calculation from being performed.
  
  
  Configuration Issues: Incorrect settings in the forecasting model or planning parameters can lead to this error.
  
  
  Zero or Negative Values: If the historical data contains zero or negative values, it can lead to issues in calculating the standard deviation.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Historical Data: Review the historical data for the product/location combination. Ensure that there is sufficient data available for the calculation. If the product is new, consider using a different forecasting method that does not rely on historical data.
  
  
  Data Cleansing: Ensure that the historical data is clean and consistent. Remove any outliers or incorrect entries that may affect the calculation.
  
  
  Adjust Forecasting Parameters: Review the forecasting model and parameters used for the product/location. You may need to adjust the settings to accommodate the specific characteristics of the product.
  
  
  Use Alternative Methods: If standard deviation cannot be calculated due to insufficient data, consider using alternative forecasting methods that do not rely on standard deviation, such as moving averages or exponential smoothing.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the error message and potential fixes.
  
  
  SAP Support: If the issue persists, consider reaching out to SAP support for further assistance, especially if it appears to be a system-related issue.
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like /SAPAPO/MC90 (for planning book) or /SAPAPO/DP90 (for demand planning) to analyze the data and settings related to the product/location.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.