RESISTOR EXAMPLE

To illustrate the use of Yield Surface Modeling, a simple resistor example
will be followed.

Imagine that this resistor is cylindrical, and has two critical output
parameters:
Resistance value(Target: 1000 Ohms)
Resistor weight(Target: 1.5 grams )

Length

Resistance =

400 x Length
(Pi x Radius)2

Weight = 1 x Pi x Radius2

x Length

FIGURE 2. INFORMATION FOR RESISTOR EXAMPLE

RESISTOR EXAMPLE

To perform Yield Surface Modeling,
information on the specificaiton limits
of the outputs (Responses),
and the mean and standard deviation of the
input variables are required.

For this example,this information is
summarized in the table below:

RESPONSES

Lower Spec LimitUpper Spec Limit

Resistance

950 Ohms

1050 Ohms

Weight

1.4 Grams

1.6 Grams

INPUT VARIABLESMeanStandard Deviation

Length2 cm.01 cm
Radius.5 cm.005 cm

MTB > NAME C1 'RADIUS'
MTB > NAME C2 'LENGTH'
MTB > NAME C100 'RESISTOR'
MTB > NAME C200 'WEIGHT'
MTB > SET C1
MTB > END
MTB > SET C2
MTB > END
MTB > PRINT C1 C2

ROWRADIUSLENGTH

1 0.49 1.8
2 0.49 2.2
3 0.51 1.8
4 0.51 2.2
5 0.50 2.0
6 0.48 2.0
7 0.52 2.0
8 0.50 1.6
9 0.50 2.4