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CR: The out-of-control (OOC) test may fail on the last sample with valid data

Revision Date: 2005-09-19

Problem:

The out-of-control (OOC) test may fail  on the last sample with valid data. When the last xx samples are selected and the last sample in the range has an ID, but no data, and the last sample with data falls outside the control limit, it is not flagged as out-of-control 

The data may appears as follows: 

Identifier Data  Out-of-control?
1/1/01 10 No
1/2/01 11 No
1/3/01 99 Yes
1/4/01    
 

In the subgroups to chart, it is pointing to the last n samples (vs. ALL samples). Below the last sample with data is another row that has only an identifier. The problem is that the OOC sample is not flagged as OOC.

Solution:

Delete the last row with the identifier (and no data) and it will work correctly or update to the latest release available.

Ref # 676

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