Activity
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Akram replied to the topic Help with Spec Calculation in the forum General 16 years, 8 months ago
Control charts usualy use 3 instead of 4.
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Akram replied to the topic info on six sigma in the forum General 16 years, 12 months ago
I am surprised that you guys are treatinting Darth so harshly. He, Mike Carmel, Vinny and Ken are the most helpful people on this forum. I am sure that if they stop participating to the forum, there will not be much left, they are the ones who keep it alive.
You need to know when someone is joking or not. Stats and Six Sigma are very dry,…[Read more] -
Akram replied to the topic How to set QA specifications? in the forum General 16 years, 12 months ago
There is no statistical relationship between the control limits and the spcification linits.
The specifications are set by the customer requirements while the control limits are determined by the process.
try this http://www.sixsigmafirst.com/controlcharts.htm -
Akram replied to the topic Formula of X-bar R chart in the forum General 16 years, 12 months ago
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Akram replied to the topic X bar and R Chart in the forum General 16 years, 12 months ago
BG,
The types of control charts used to monitor quality depend on the nature of the data gathered. Monitoring the production of parts that just either good or bad is different than monitoring specific CTQ ( such as length, weight ) on a part. In other words, the type of control chart will depend on whether the data gathered are attribute,…[Read more] -
Akram replied to the topic C U control charts in the forum General 17 years ago
The c-chart monitors the process variations due to the fluctuations of defects per item or group of items. The c-chart is useful for the process engineer to know not just how many items are not conforming but how many defects there are per item. Knowing how many defects there are on a given part produced on a line might in some cases be as…[Read more]
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Akram replied to the topic Confidence Level Question in the forum General 17 years ago
try this website. scroll down to the bottom of the page and you will have the answer to your question.
http://www.sixsigmafirst.com/sampling.htm
Akram-Al Qiram. -
Akram replied to the topic SPC in sixsigma in the forum General 17 years ago