jediblackbelt
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jediblackbelt replied to the topic Xbar charts with varying sample size. in the forum General 16 years, 10 months ago
Darth –
What I am really thinking about doing is the IMR chart and then rolling a MultiVari chart together to come up with daily/shift differences in set ups. What are your thoughts on that method? Also, when you mention a weighted average chart how would I roll that out? Could I still use a vaiable grouping for my dispersion or would I be…[Read more] 
jediblackbelt replied to the topic acceptance criteria for ANOVA gage RR study in the forum General 17 years, 2 months ago
I would suggest the AIAG book to look up those things. Or of course the numerous software packages or when all else fails do a google search for the topic.

jediblackbelt replied to the topic Calculating minimum manning levels in the forum General 17 years, 3 months ago
Take the total time to create your part. Say you have a part that takes 4 operations in a cell to build and you have a takt time of 1minute.
If the cycle time of A=1.0, B=2.0, C=.5, & D=.5 then your total amount of labor to build is 4.0 minutes. Take the 4.0 / 1.0 and you get total number of operators = 4.
Make sure though if you put you…[Read more] 
jediblackbelt replied to the topic Capacity Utilization in a BPO(NonVoice) in the forum General 17 years, 6 months ago
Chanda –
The way I have always done utilization is a little crossed from the other responses. It looks like one gave you efficiency, the other gave you utilization and the third gave you what looks to be rolled throughput yield.
The way I have always seen and done utilization is work hours / clocked hours on job. So if you worked 6 hours on t…[Read more] 
jediblackbelt replied to the topic who willl decide RPN in FMEA in the forum General 17 years, 7 months ago
1. Never heard of it.
2. Follow the AIAG guidelines and/or customer specifics for deciding how to rate your PFMEA. Nobody “decides” what your RPN is a calculated number based on the Severity, Occurance, Detection. Your Severity is based on (obviously) how sever the effect is if it happens. In the automotive world you aren’t allowed much free…[Read more] 
jediblackbelt replied to the topic who willl decide RPN in FMEA in the forum General 17 years, 7 months ago
1. Never heard of it.
2. Follow the AIAG guidelines and/or customer specifics for deciding how to rate your PFMEA. Nobody “decides” what your RPN is a calculated number based on the Severity, Occurance, Detection. Your Severity is based on (obviously) how sever the effect is if it happens. In the automotive world you aren’t allowed much free…[Read more] 
jediblackbelt replied to the topic CAPA programs in the forum General 17 years, 9 months ago
I have pretty much used PFMEA for the PA side of the coin. What are the potential causes and then go after them. We also do a lot of PA work with Kaizen suggestions for improvements. Don’t get too wrapped up in the “well if they have already seen it then is it CA?” Bottomline is to solve the problems at hand and as long as you are con…[Read more]

jediblackbelt replied to the topic Effeciency calculation, need help in the forum General 17 years, 11 months ago
This is where I would calculate two ratios. The one is what I posted earlier about the efficiency and then you can calculate utilization. Take the two and multiply them to get productivity. Now you are finding out if you are spending money making parts and you are finding out how good to standard you are at making parts. You don’t pay for rew…[Read more]

jediblackbelt replied to the topic Effeciency calculation, need help in the forum General 17 years, 11 months ago
Alright, lets say the next shift comes in and produces 200 parts. Now for two shifts I have 360 parts with 2 minutes per part totals 720 earned minutes and I have used 960 minutes of time. So I have 720/960 or 75% Efficiency.
What am I missing? Always up for some teaching especially if there is some improvements to make. 
jediblackbelt replied to the topic Effeciency calculation, need help in the forum General 17 years, 11 months ago
I calculate efficiency based on earned hours – which is usually a standard way to calculate it in the IE costing world. A part has an amount of time that it requires to make it. This is the standard time and includes PFD allowances (Personal/Fatigue/Delay). Every good part you make then earns you that amount of time. You then take those hou…[Read more]

jediblackbelt replied to the topic OEE in the forum General 17 years, 11 months ago
Zack –
Company must have the firewall tightened up a little. Can you send it here?
[email protected]
Thanks, 
jediblackbelt replied to the topic OEE in the forum General 17 years, 11 months ago
Zack –
Here is my work address.
Thanks,
[email protected] 
jediblackbelt replied to the topic OEE in the forum General 17 years, 11 months ago
Zack –
Sounds like you are really using OEE to its fullest. I am very interested in the chart you use to present. I have always struggled with a method to use it and still get information to improve my operations from it. Any way possible I could get an example of your method of presenting it?
You are right, the way I came off with mak…[Read more] 
jediblackbelt replied to the topic OEE in the forum General 17 years, 11 months ago
Zack –
I don’t want to argue that OEE is/is not a critical factor. I use OEE all the time the problem is it tells me I need to improve not where. If I tell you that your OEE is 75% where do you focus improvement efforts? It tells me I have 25% of my equipment effectiveness is available for improvement, but it doesn’t tell me where to focus im…[Read more] 
jediblackbelt replied to the topic OEE in the forum General 17 years, 11 months ago
Billybob
The OEE measurement is a decent measurement of how your process is sitting and if you have any opportunities for improvement in the process. The only problem I have with it is that OEE by itself doesn’t tell you anything on “where” to improve only that you have improvements to be made – kind of like RPN.
I use OEE, but don’t r…[Read more] 
jediblackbelt replied to the topic Hypothesis Testing Clarification. in the forum General 17 years, 11 months ago
I typically use the Ftest to determine if I am eligible for ANOVA. If the Ftest shows variances are equal then I use ANOVA for my results. If I fail to accept the null on Ftest then I use Ttest without equal variances.

jediblackbelt replied to the topic SSBB Question in the forum General 18 years, 2 months ago
Here we go again. I personally am proud to say I am certified as a ASQ BB. However, the floodgates will open as to what that really means. But then again, like openings in the body eveyone has an opinion. Bottomline is can you deliver results? What do you want to prove? True, anybody can study and pass the test, although I did think it encom…[Read more]

jediblackbelt replied to the topic Including rework processes in yield calculations in the forum General 18 years, 2 months ago
The question should be is rework a part of your normal process? If for some off the wall reason it is then count your defects. Rework is a NVA operation and should be avoided. Adding additional rework defects to the normal process defects will skew the data and does not make sense with regards to lean. Eliminate the rework is the goal and by…[Read more]

jediblackbelt replied to the topic ANOVA question. in the forum General 18 years, 3 months ago
I guess that is what is confusing me. I understand Rsq for my regression and correlation models, but for ANOVA when I am interested in the difference in means is where I am confused. Is it telling me the basic same thing as Pvalue and Fstats – that there is a difference in means and I am certain of it? I guess having a Rsq value for ANOVA I ju…[Read more]

jediblackbelt replied to the topic Applying Six Sigma in Government Organizations? in the forum General 18 years, 4 months ago
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