How To Fix PR422 - Trend test is positive

SAP Error Message - Details

• Message type: E = Error

• Message class: PR - Forecast: Help messages

• Message number: 422

• Message text: Trend test is positive

What causes this issue?

The system has examined the historical data to see if it shows a trend
pattern. A trend pattern has been detected.

System Response

The system will use a trend model to carry out the forecast.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PR422 - Trend test is positive ?

  The SAP error message PR422, which states "Trend test is positive," typically occurs in the context of statistical process control (SPC) or quality management within SAP. This message indicates that a trend has been detected in the data being analyzed, which may suggest that the process is not in control and could be drifting away from the desired performance.
  Cause:
  
  Data Trends: The underlying cause of this error is usually related to the data collected over time showing a consistent upward or downward trend. This could indicate that the process is not stable and may require investigation.
  Process Variation: It may also be a result of special cause variation, where external factors are affecting the process.
  Control Limits: The control limits set for the process may not be appropriate, leading to false positives in trend detection.
  
  Solution:
  
  Investigate the Data: Review the data points that triggered the trend test. Look for any anomalies or changes in the process that could explain the trend.
  Check Control Limits: Ensure that the control limits are set correctly. If they are too tight or too loose, they may lead to incorrect conclusions about the process stability.
  Root Cause Analysis: Conduct a root cause analysis to identify any underlying issues that may be causing the trend. This could involve looking at changes in materials, equipment, personnel, or methods.
  Process Adjustment: If a trend is confirmed, consider making adjustments to the process to bring it back into control. This may involve retraining staff, recalibrating equipment, or changing materials.
  Continuous Monitoring: Implement continuous monitoring of the process to ensure that it remains stable and to catch any future trends early.
  
  Related Information:
  
  Statistical Process Control (SPC): Understanding SPC principles can help in interpreting the trend test results and making informed decisions.
  Quality Management: Familiarity with quality management practices and tools can aid in addressing the issues that lead to trends in process data.
  SAP Documentation: Refer to SAP's official documentation or support resources for specific guidance on handling error messages and understanding the context of the PR422 message.
  
  If the issue persists after taking these steps, it may be beneficial to consult with an SAP expert or a quality management professional for further assistance.