Analog Interfacing to Embedded Microprocessor Systems, 2nd Edition

will come from the same manufacturing batch and therefore may be very close

to each other in value. These could not be considered independent parts.

.

The components you are tolerancing should have some reasonably normal

distribution. For example, suppose that you are using a voltage reference diode

and suppose that the manufacturer selects out the ones that are very close to the

nominal value for sale at a higher price under a different part number. The

parts you will be left with will not be normally distributed, but will be skewed

toward the ends of the tolerance band.

When you have finished the calculations, you will have an estimate for the

range ...