W

warn rule

A SPC rule with a status of warn. When a data point violates a SPC rule with a warn status, the data point is accepted and is included in monthly and cumulative statistics and is reported to the Unity™ Interlaboratory Program for consensus group comparison.

Westgard rules

A laboratory QC system based on a set of six core statistical rules, each having statistical power to detect random and systematic deviations from the norm.

Worldwide Report

The Worldwide Report is provided through the Unity™ Interlaboratory Program. The Worldwide Report contains all Peer group and Method group statistics and is a good reference to use when evaluating a new instrument or kit. The Worldwide Report includes:

• All Peer group and Method group statistics.
• All tests (including all instruments, all methods, and so on) reported to the Unity™ Interlaboratory Program by all laboratories reporting on the same lot number.
• Monthly and cumulative statistics (mean, SD, CV, number of points, and number of laboratories) for each level of control.