Control charts for rare events

VSht — Tue, 03 Nov 2020 22:46:02 GMT

Hi,

There is a RAREEVENT procedure in SAS/QC, beautifully explained by Cat Truxillo in a video.

What resources are available for this in Base SAS or EG?

Thank you

Re: Control charts for rare events

Rick_SAS — Tue, 08 Dec 2020 15:21:57 GMT

It is possible to do these computations and graphics without SAS/QC, but it requires that you understand the statistical methodology and the graphical techniques that are used. For many non-experts, this is a big learning curve, which is why they license SAS/QC to access these methods out of the box.

For example, look at the Getting Started example for the RAREEVENTS procedure.

If you are familiar with the relevant statistics, you can do the following:

Use PROC UNIVARIATE to fit a geometric distribution the the LAGs of the events.
Use PROC SGPLOT to overlay the empirical lags and the expected lags.
Use the CDF function in Base SAS and the formulas in the RAREEVENTS documention to compute the control limits.
Use PROC UNIVARIATE for the ECDF tests, if desired
Use the BAND statement and the SERIES statement in PROC SGPLOT to create the plot.

Re: Control charts for rare events

VSht — Tue, 08 Dec 2020 21:15:07 GMT

Thank you Rick. This is a great instruction.

topic Control charts for rare events in Statistical Procedures

Control charts for rare events

Re: Control charts for rare events

Re: Control charts for rare events