Star18 said:
I see Steven !
But I'm a little confused about what you said : the only use of the individual values and moving range charts in the case of one part by sample. Our SPC software gives us the possibility of plotting X bar/R charts (and other control charts) if we have a part per sample with grouping them per 5. As a consequence d2 is equal to 2.326.
Someone can comment ?
Rach.
But I'm a little confused about what you said : the only use of the individual values and moving range charts in the case of one part by sample. Our SPC software gives us the possibility of plotting X bar/R charts (and other control charts) if we have a part per sample with grouping them per 5. As a consequence d2 is equal to 2.326.
Someone can comment ?
Rach.