jediblackbelt

Actually there is.  The tubs come from different machines, but get mixed at the customer.  So I know what my percent overall fallout is, but not which machine comes from.  So I went this route trying to track down the machine problem.  Since then we have sampled parts off of each machine to track it down, but I wanted to “clean up my mind” to see…[Read more]

Agreed.  I would think about it this way.  If you use the Xbar chart with 1 week as your subgroup then you will tell difference from week to week and if there is a within variation, correct?
However, you won’t be able to see if it is an issue that happens every Wednesday and then drops down.  The X-bar range will wash that out and your av…[Read more]

For manufacturing… THE GOAL

Wow.. tons of answers so I might as well give my two cents worth and maybe only that.
Efficiency is based on actual versus standard. 
     Earned hours = pieces * standard hrs/piece
     Efficiency = earned hours / hours worked on standard
Utilization = hours making parts / clocked hours
Productivity = utilization * efficiency
Just another…[Read more]

Cool.  Not off base, just misread.  Good thing this isn’t a stats test.  Thanks for the clarification.
 

Maybe I am reading his question wrong, but I read it as if I flip a coin 3 times what is the probability that only one of them is heads.  If that is the case then wouldn’t you use the binomial probability? 
I come up with a .375 chance that flipping a coin 3 times that only 1 of the coin flips will be heads. 
Am I off base?

A lot of ways to handle things of this nature.  Timestudy is one way, but it will ignore the other duties that typically are done by the team.  So if all they do is repeatable and consistent then going with a timestudy probably would work well.  In my opinion when dealing with paperwork and processing it through a system you can take the times to…[Read more]

Seriously Pinto… if you have to ask then do you even have one?
Maybe your new delta tau name should be flounder…

You know what they say.
If it looks like it, smells like it, it probably is it…

John –
Gotta love Tukey Tail count type of experiments.  Can’t say enough about them to everyone else.  How something so simple can save so much time in a project and then lead down to fix the problem.
IE – You may also want to look into multi-vari charting against your production/quality defects to see if you have a problem across the board o…[Read more]

Nothing more than a Star Wars fan trying to become one with the universe and six sigma.

Next step… try to define a little more of what you want.  Everyone here has enough spare time to go ahead and give you everything you need.  No thanks necessary. 
Darth –
I am in a middle of a project that needs completed.  Got any free time to go ahead and complete it for me?  I really need to get out to the Death Star and sacrifice some wookies.

Try QIMacros.  He has a ton of stuff centered around excel.  Pugh matrix is in there.

I would like to request somebody like a Darth, Stan, or Mike Carnell answer as well.  Their opinions in this forum are typically right on the money (insert large smooching sound here).  For those of us that have left companies as BB and done a lot of training of others and projects.  How do you gain the rank of MBB legitimately without having a co…[Read more]

Hector –
I would look at performing an Interclass Coefficient Correlation (ICC) study.  You can look information up by Don Wheeler you could also send me your email and I could get you an excel worksheet that explains it.  What you primarily are doing is comparing the variation of a known standard with what you are measuring and see how much v…[Read more]

Even though I agree that this question is basically odd for anybody that has had any of the training I will try to give some response.  I figure by now you have been beaten down enough. 
Use the tools where you need them.  I have seen projects completed at the MSA level because we found our process was fine, but the gaging and inspection was no…[Read more]

Looks like nobody else is jumping in so I will break the ice and start to take the heat because I also want to know a better way of doing it.
What I have done is to perform repeats within the run.  So my response would be a percentage of failures.  So I may run one sample run and within that run sample 100 parts and find that 40 are bad. …[Read more]

How about trying to do a DOE on the gages and operators.  You could then come up with something to show whether or not it is a difference due to operators or gage or the interaction between the two.
Just a suggestion too is that if you do a paired T-Test to also use only one operator.  Otherwise you are throwing in a variable that you can’t ac…[Read more]

How I have always attacked OEE for a cell would be to calculate the uptime based on total machine hours.  So if you have a total of 10 machines and they can all run for 8 hours you have a total of 80 machine hours to work from.  If you have a machine (non-bottleneck) go down for 5 hours you subtract the 5 hours.  If you have your bottleneck go do…[Read more]

Rachel –
On a more micro (Cell) level I have looked at Lead time as the time it takes to get a piece from start to finish.  So I would tag a piece at the beginning of the process and then time it until that piece ends up in the ship container as a completed part. 
The throughput I have always looked at as how many pieces / time period you a…[Read more]