I would like to add that it is a good practice to identify and report the minimum SIR
readings when taking continuous or near continuous readings.  It is not a good idea to
let computer software just printout an average SIR without some further evaluation and
thought.  The minimum should also be reported and the data around the minimum should be
reviewed either graphically or on a spreadsheet to insure its validity.  We have seen
brief but real SIR failures in some of our studies that have corresponded to product
lots with field problems.

--
John Moylan

Delsen Testing Laboratories, Inc.
1024 Grand Central Ave.
Glendale  CA  91201
Phone: 818 247 4106
FAX:   818 247 4537

Kiiski Jarmo wrote:

> To estimate the average of SIR-test results should arithmetic or geometric
> mean used and how standard deviation should calculated?
>
> B.R.
> Jarmo Kiiski
>
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