2 Replies Latest reply: Oct 8, 2012 3:20 AM by Helen Pippard RSS

    SPC Chart - on median value

    Helen Pippard



      I am trying to build an SPC chart on the median value by week


      But I do not know the best approach on how to build my chart


      1) As I need to find my median shall I write this in the edit script as follows:





      This creates an error in the expression


      How would I write the UPPER CONTROL LIMIT based on the fact that a median needs to be calculated by week?









      Any suggestions?


      Kind Regards