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Is This How You Are Using LSS Terms?

Six Sigma – iSixSigma Forums General Forums Tools & Templates Is This How You Are Using LSS Terms?

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  • #53926

    Bryan Ostrowski
    Member

    Process Cycle Time: The complete time (minus delays) from start to finish of a process.
    (E.G. A machine shop has 5 seperate process steps and each takes 1 minute with a 1 minute delay between each.) The PCT is 5 minutes.

    Process Lead Time: The total time from start to finish including delays. (E.G. the above example would be 10 minutes.

    Cycle Time: The total time it takes to complete an individual step. (E.G. the above example would be STEP 1: 1 minute STEP 2: 1 minute……….)

    I hear people confuse CT and PCT a lot and have even gotten into arguments about the topic.

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    #192041

    jab
    Guest

    Process time is an elapsed measure of time or “clock time”…the time it takes a unit of work to move from the beginning to the end of the process. Cycle time is a rate measure…CT is the same as PT when a manual process is executed using a single operator…Lead Time is also an elapsed measure of time…from order to delivery or order to cash…..for a given value stream (aka multiple processes). To illustrate, you may have a widget that takes 2 hours to move through a manual process (PT & CT = 2 hr), but by adding a second operator, you have now cut the CT in half (PT/number of operators = CT so 2 hrs/2 operators = 1 hr) while reducing the overall lead time by 1 hour (assuming you are working on the constraint). Good luck.

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    #192042

    MBBinWI
    Participant

    Depends more on how your software tool defines these.

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    #192049

    Mike Carnell
    Participant

    If you are arguing over definitions of Lean terms you should probably find a hobby. It isn’t worth the stress in your life.

    There are a lot of different definitions out there. When you are internal you get to standardize on your “right” terms and as long as you don’t change them it doesn’t matter. When you talk with people from someplace else and they have a different definition you just ask them what they mean and agree to what gets called what.

    If we were discussing something like religion this might come under diversity training. It is part of what keeps you from looking like an idiot when you start an argument over a word/definition.

    I used to have a consultant, using the term loosly, that refered to himself as a Six Sigma zelot. Thought Lean was a bunch of arm waving. It was difficult to actually pay any attention to him anytime he opened his mouth simple because he was so mentally constipated.

    Just my opinion.

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    #192050

    MBBinWI
    Participant

    Constipation of the brain, and diarrhea of the mouth – bad combination.

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    #192093

    Bryan Ostrowski
    Member

    Thanks jab……I agree.

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