Calculating the Specification Limitsmain topic
Calculating the Specification Limits|
Component |
|
|
Name of the elements in the assembly. |
|
LSL |
= |
|
Element lower specification limits. If not specified, Minitab calculates using long-term element Z.Bench and long-term element standard deviation as shown. |
|
Nominal |
= |
Ti |
Element nominal values. If not specified, Minitab uses the mean. |
|
USLi |
= |
|
Element upper specification limits. If not specified, Minitab calculates using long-term element Z.Bench and long-term element standard deviation as shown. |
|
Z.LSLi |
= |
|
Long-term Z score of the element lower specification. |
|
Z.USLi |
= |
|
Long-term Z score of the element upper specification. |
|
PPM.LSLi |
= |
F(-Z.LSL) * 106 |
Defects parts per million associated with the lower specification. |
|
PPM.USLi |
= |
F(-Z.USL) * 106 |
Defects parts per million associated with the upper specification. |
|
PPM.Totali |
= |
PPM.LSLi + PPM.USLi |
Defects parts per million associated with the specification limits. |
|
%Y.FTi |
= |
|
First time yield in percentage of the ith element. |
|
DPUi |
= |
|
Defects per unit. |
