Variability Among Engine Raters 630131

Final engine tests on a new crankcase motor should be fast and economical yet able to discriminate between oils of high quality. Tests should be properly designed in advance to obtain optimum quantity of information, and the expected variability and its sources should be known. However, the experiment can be designed to partition and measure this variability for use in future experimental designs for the same or similar test methods. This paper describes the method of partitioning and measuring variance due to choice of raters that was encountered in treating data obtained from a taxi fleet test.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.