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Manuellement Reference line per period

BUDBEERBX

Community Member

Joined:

Aug 2, 2017

Hi,
I perfom control charts and i computer cpk for and centrre line with UCL and LCL. This items are added manually with a double clic on the axis. I would like to addition different centre lines calculated permet period (e.g: period 2015 to 2016 Ref line=0.60 and for the 2016 to 2017 Ref line=0.70).
Thans in advance
Bud
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