How to control the scal of x-axis of Histogram Chart(SPC)

[former_member381378]

Hi,

I am facing a problem in SPC Chart of Histogram Type.

What I can see that it creates the x-axis scale depending upon the measurement point range only. So if Lower Specification Limit (LSL) and Upper Specification Limit(USL) are a bit away from the minmum and maximum measurement point then it does not display the LSL and USL. Is there any solution for that

My raw data set is as follows-

Here measurement points are in between 0.027 and 0.028 and LSL USL does not fall in this range. So It is not plotted in the graph. Now how to get LSL and USL line in the graph.

Char_val LSL USL Target

0.028 0.025 0.03 0.028

0.027 0.025 0.03 0.028

0.027 0.025 0.03 0.028

0.027 0.025 0.03 0.028

0.028 0.025 0.03 0.028

0.027 0.025 0.03 0.028

0.028 0.025 0.03 0.028

0.027 0.025 0.03 0.028

0.028 0.025 0.03 0.028

0.027 0.025 0.03 0.028

0.027 0.025 0.03 0.028

[jcgood25]

Soumen,

Even though the vertical lines are not within the boundaries of your Histogram chart bars XAxis scale, the USL, Target, and LSL do show up in the legend and have their corresponding values displayed there. Will simply seeing the numbers beyond the range of the bars be enough to inform the users that all collective measurement points are within Spec?

Regards,

Jeremy Good

[former_member381378]

Hi Jeremy,

Thanks for your response.

Agree with you that LSL and USL are displayed in the legend.

But if it was displayed in the histogram chart along with the bars, then probably user could have get a better view.

Like in SPC XBar chart along with the data points, LSL and USL are also always displayed.

So x-axis scale is decided by xMII internally depending upon the measurement points and programmer can not do anything on it. Right?

Thanks and Regards,

Soumen Mondal