LTMS Version 2 Sequence VID Example LTMS TF SS May 11, 2010
Reference Oil Data 235 data entries 160 chartable tests Five test laboratories (A, B, D, F, G) 35 test stands 2 stands only had one ref test These stands were not included in this analysis Reference oil timeframe: 1/18/09 – 4/7/10
New LTMS for the VID Set = 0.3 (same as the ‘old’ system) Stand Based Severity Adjustment System “Old system” used continuous SA Primary Parameters FEI1, % FEI2, % Set = 0.3 (same as the ‘old’ system) Assumed pass limit based on xW-20 viscosity grades FEI1=1.4, FEI2=1.2 Set Shewhart limits to ±3.0
LTMS Version 2 Chart Constants and Limits
FEI1 Effective Pass Limit Results
FEI2 Effective Pass Limit Results
FEI1 Variability Results
FEI2 Variability Results