1. LTMS Version 2 Sequence VID Example
LTMS TF SS
May 11, 2010

2. 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

3. 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

4. LTMS Version 2 Chart Constants and Limits

12. FEI1 Effective Pass Limit Results

13. FEI2 Effective Pass Limit Results

14. FEI1 Variability Results

15. FEI2 Variability Results