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Track 3 Session 11
10:30 to 11:30 a.m. Thursday June 19, 2008
Keeping Field Data Simple(r) – TTR and a
Simple Analysis
There are often two extremes in
field data analysis, either a simple assumption of a constant
replacement rate (accumulated hours/replacements) or complex
statistics. This presentation explains an approximation method that
uses the knowledge of when serial numbers were installed, the
run month in which the serial number had a replacement (determined by a
database) and a relatively simple analysis based on a spreadsheet.
While this yields only approximated results, it gives far more usable
information than a constant rate assumption. It does not require the
user to perform statistics, or maybe more importantly, it does not
require the customer
of the information to understand statistical output.
Key Words: Simplified Field
Data Analysis
Jerry Ackaret and David Cottrell
IBM
Beaverton, Oregon |
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