iSixSigma

Chandran

Forum Replies Created

Forum Replies Created

Viewing 6 posts - 1 through 6 (of 6 total)
  • Author
    Posts
  • #184535

    Chandran
    Participant

    Quality Management System like ISO 9001, are set of requirements, and says what you should do? Not much on how it is done, It is a frame framework  built on PDCA Cycle. Once you are certified, along with fulfilling requirements, you also need to show continual improvement.
     
    Six Sigma on the other hand is tools enables you achieve those set requirements, example the caluse 8 (Measurement Analysis and improvement )
     
    Yes definitely an ISO9001:2008 certificate held by suppliers will have influence global purchasing decisions

    0
    #175795

    Chandran
    Participant

    Hi, I would like to add few more points to review:
    1. Whether the complains are from one product or various products. (It could be variants on the main product). Try to visualise pareto for any clues
    2. What type of customer complaints? Can you categorise these customer complaints? If yes, again apply pareto for any clues?
    3. Mode of Purchase made by Customers? It could visiting showroom, or through internet or through telecalling or through reference or through exhibition sale etc. This could also lead on which type of sale the complaints are more?
    4. All these Customers what they actually needed; but what was sold to them? Trying to findout customer needs and wants could help you to findout the root cause that caused in misunderstanding / communication happened during sales processes.

    0
    #137364

    Chandran
    Participant

    As we know from Normal Distribution curve
    The area of 1s covers approximately 68% of all values,
    at 2s there are 95% and
    6s (six sigma) contains 99,99996% of all values.
    The theoretical value of 100% can not be reached in practice, because the curve meets the x axis in the infinity
     
    Now For Dabbawallas PPM Calculation:
     
    No of Dabbas Served / day=200000
    No of Dabbas Served per month= 200,000X25= 5,000,000
    Error Rate is 1 in 2 Months
    I.e. 1 error in 20,000,000 transactions (Collection & Delivery)
     
    PPM=0.058 or 6.8 Sigma
     
    Now six sigma gives us 3.4PPM. Is there anything beyond to measure that??
    The current six-sigma level is decided by Motorola to have a 10-fold increase in profits. Why, because most of Motorola’s products are complex and have many steps in the manufacturing process. With many parts as well. It was based on a typical 1200 part step process. And also 1.5 sigma shift.
    Juran indicated back in 1980 when referring to a 3 sigma wide bell shape curve on a normal distribution, that if your specification was at 4 sigma, then there was a better chance to catch bad parts before shipping them when you were doing SPC, (Statistical Process Control).
     
    Now can we rate Dabbawallas seven or eight sigma?
    Dabbawallas collect Dabba from Home & Deliver it to offices, This cycle is reversed in the  afternoon
     
      The CTQ (critical-to-quality parameters) address before lunchtime:
    (1) Lunch boxes must be delivered on time, and
    (2) Recipients must receive their own lunch boxes and not some one else’s.
     
    Humble Dabbawallas are still not aware of this calculation and they don’t accept making 34 mistakes in two months, which gives them 6 Sigma
     
    “ We make a mistake perhaps once in two months . Our livelihood depends on delivering efficiently”  told Raghunath Medge, President, NMTBSA
     
    Then Why Motorola did not go for Seven or Eight Sigma?
    As it just wasn’t practical from an economic point of view for Motorola .At some point spending money to train and monitor people and processes just wasn’t going to return on the investment. Of course all of this goes same for GE, 3M, Dupont, Honeywell, etc.
    Six sigma is the best productivity toolkit that exists today; The figure of six was arrived statistically by looking at the current average maturity of most business enterprises. We need to wait for new Toolkit till world becomes a more orderly and predictable (even with increasing entropy or chaos) place to live!
     
    Till then we can rate our Dabbawallas with Superlative term ‘Beyond Six Sigma’
    Six Sigma has one purpose: To serve the business. The business does not serve Six Sigma.

    0
    #104423

    Chandran
    Participant

    Hi
     
    Please send me some sample project reports and examples.
    Thanks
    Murali
     
    My Mail id: [email protected]

    0
    #89595

    Chandran
    Participant

    hi Praveen,
    Thanks for your response. The purpose that I had in my mind is using those baselines for future estimation. I am of the opinion that one needs to identify and eliminate special causes of variation before coming up with such baselines. what do you think?

    0
    #89547

    Chandran
    Participant

    Does it make sense to create metrics baselines out of an unstable process?

    0
Viewing 6 posts - 1 through 6 (of 6 total)