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Definition: Trend analysis involves using mathematical techniques to forecast future outcomes based on historical results. Trend analysis is often used to monitor:
Technical performance—how many errors or defects have been identified, how many remain uncorrected Cost and schedule performance—how many activities per period were completed with significant variances.

Acceptance Level:  Generally accepted

Alternative or Related Terms: Quality control

Application Areas/Intended Uses: Trend analysis is a tool or technique used in quality control.

Chief Advantages: Trend analysis, as used in quality control, examines a range of project results over time to determine if quality is improving or deteriorating.

Additional Reading:
Quality Assessment and Improvement Processes and Techniques. J. David Montgomery. PMI 2000 Seminars & Symposium Proceedings, Houston, Texas USA.
Quality Tools/Techniques and the Project Manager. Patricia McMahon, Ellen Busse. PMI 2001 Seminars & Symposium Proceedings, Nashville, Tennessee USA.