control chart help

This topic has 3 replies, 4 voices, and was last updated 14 years, 10 months ago by The New MB.

Viewing 4 posts - 1 through 4 (of 4 total)

Author

Posts
August 29, 2007 at 2:12 am #47979

BB
★ 10 Years ★
Participant

@BB Include @BB in your post and this person will
be notified via email.

process measure is # of items actually produced per hour divided by # that should have been produced per hour to get a percent effectiveness to the standard rate of production.
which should i use? a p-chart of percentages or c-chart of # of items produced per hour or an I-MR chart of # of items produced per hour because the counts are pretty high (a few thousand per hour)
Thanks, BB

0

August 30, 2007 at 3:10 am #160567

Evil
★ 10 Years ★
Participant

@Evil Include @Evil in your post and this person will
be notified via email.

Hi BB…
If your counts of items are sufficiently “away” from zero (which it sounds like it) and there is enough variation in the numbers produced each day, then an I-MR chart would work just fine. A c-chart is also an acceptable alternative. A p chart is not applicable in this case.
hope this helps…
E

0

August 30, 2007 at 5:47 am #160571

Jamilah Haron
★ 10 Years ★
Participant

@Jamilah-Haron Include @Jamilah-Haron in your post and this person will
be notified via email.

Hi,
Since you are measuring % effectiveness, I suggest p chart .
Regards.

0

August 30, 2007 at 8:00 am #160574

The New MB
★ 10 Years ★
Member

@The-New-MB Include @The-New-MB in your post and this person will
be notified via email.

Why?P-Chart is for Defevtive with variable sample size

0
Author

Posts

Viewing 4 posts - 1 through 4 (of 4 total)

The forum ‘General’ is closed to new topics and replies.