Module 9

Levey-Jennings Chart

This chart is used to Evaluate Run Quality, Systematic Error, and Random Error

Random Error

It is any deviation AWAY from an expected result

1. Acceptable/Expected Random error

2. Unacceptable/Unexpected Random error

There are two types of RANDOM ERROR:

1. Defined and quantified by standard deviation.

2. Any data point outside the expected population of data

1. Westgard Rules

2. Dr. James Westgard

1. This rule is based on principles of statistical process control used in industry nationwide since the 1950s

2. Who made this Rule?