Sridhar

Hi ravi,
       Why dont you try this journal
     http://www.triz-journal.com/archives/
hope this helps you in understanding TRIZ
bye
sridhar
 

Hi,
      Why dont you try this website. It willgive you  a very simple and elaborate explanation with examples.
http://www.itl.nist.gov/div898/handbook
Hope this may help you for better understanding.
bye
sridhar
 

Hi Ali,
         There is a web site of Inetnational Society for Six Sigma Professionals. ( http://www.isssp.org) You can go to this web site. THere you will get some of the six sigma affliates at resource centere. There it is written that
   House of Quality Business and Management Consulatation(Patkistani)
I dont know whether they will cond…[Read more]

Hi ram,
        I send the case studies to your address given, but it bounced back. Give me the correct mail id i will send once agin.
bye
sridhar

Hi,
     We assumed 1.5 sigma shift in the process to include the longterm effect. Every process has a chance to have shift because of many reasons, like tool wearing, change in operators, change in environment so many reasons. You cant take six sigma project whenever the shift occurs because of lot of cost and effort inovolved. THat is why the…[Read more]

Hi hoon,
       Cpk and Cp will be equal when your process centered. If your process is off centered then Cp will be higher than Cpk. Cp tell you that how much is your process capability. But Cpk tell you whether your process is shifted or not. The paragraph you mentioned says that keep your process at Cpk = 1.33 so that your process capab…[Read more]

Hi akro,
         I have two papers on FMEA. One is a case study done at a Hospital i.e. how to improve the service in a restaurent in a hospital. Second one is a paper explaining about FMEA.
    If you are interested send me the e-mail i will send you the two papers.
sridhar
 

Hi rajesh,
        Why dont you have a mean you. What ever the data points are there then definitely you have a mean. You will not have lower specification limit.
 You can calculate Cpk as (USL – mean / 3*Sigma)
sridhar
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Hi suzanna,
           I will be very grateful if you send the report to my mail id
[email protected]
 
thanks
sridhar

Hi stan,
        If the target is centered then both Cp and Cpk equal is int it right?
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sridhar

Hi,
          Predictive modelling is nothing but you have to predict some response variables by using certain dependent parameters. I am in software so i will give you example with software process only.
Suppose take the inspection process in software. We will inspect different artifacts ( documents ) and prepared a defect log. These no.of de…[Read more]

Hi,
     I know that if your process is at six sigma your Cp is 2. It is calculated as follows.
basically Cp = (USL-LSL)/ 6*stddev. When your process is at six sigma level it means that you can incorporate 12 stddev within USL and LSL
i.e Cp = 12 * Stddev / 6* stddev = 2
Cpk = 4.5*stddev / 3 * stddev = 1.5 ( taken 1.5 shift on one side )…[Read more]

Hi,
        Please send me your mail id. I am having two case studies on Prioritizing software requirements which used AHP ( ANalytic Heirarcy process ) . It is having good explnaiton about the process also.Send me your mail id i will send you the papers.
bye
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Hi,
      Normally the Process Capability should be as minimun as 1.33. IF it is more then it is well and good.
 
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Hi,
       Coeffecient of varation helps you to find out whether you want to consider one sigam or 3 sigma to develop control charts. THis is only recommendation. When your sigma is very high if you take 3 sigma values almost every point will fall in within control because of large distance between control limits and centre value. To avoid this…[Read more]

Hi,
      Taguchi loss function says that if you go away from your target values your cost increases. Same as six sigma it says that try to be centered at target and have less variation so that you can make only 3.4 defects per million. To attain six sigma you can use any method or technique etc. One of those techniques is DOE.
bye
 

Hi,
I am not experienced this kind of situation but i try to answer it within my knowledge. Even the machines are same there may be some variation in the products what you are making may be becuase of operators, m/c parameters setting etc. So what i feel is try to do some hypothesis testing on the 12 machines i.e. sample mean and variance of…[Read more]

Hi ravi,
        You are right. But what i mean to say that. You should take care that your control limits should always be less than or equal to Specificaiton limts to assure that your process is within control.
 
sridhar
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Hi
       Specification Limits are set by the customers only. We will set our Control limits so that finally we achive the customer specifications limits. Control limits comes from the natural vaiation within the process. Always control limits are less than or equal to specifications limits.
bye
 

Hi,
        When you say that your process is at 3 sigma or six sigma you will say it with respect to specification limits. Now when your process is at three sigma that implies that you are able to incorporate 3 + 3 sigma variation with in the specifications. When you say it is six sigma that imples that you are able to icorporate 6 + 6 sigma…[Read more]