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  1. Max93

    QCQA for Roads - alpha, should the LSL, and engineering limit be a mean value? Or adjust?

    "First, I would suggest you ask your fellow engineers at work this question. Part of being an intern is knowing you need help from people with more experience." I have taken this to my manager, as well as another senior Engineer in the building. I haven't got a definitive answer on this...
  2. Max93

    QCQA for Roads - alpha, should the LSL, and engineering limit be a mean value? Or adjust?

    Hi, I am doing a QC/QA analysis for road state department I'm at for my internship. But I've hit a key stumbling block. The minimum 'engineering limit' strength is 2900 psi. The "LSL" is 3900 psi. However my understanding is that the LSL should be a minimum *mean* value for a lot - whereas in...
  3. Max93

    Engineering standard to determine if DOT has been under/over testing highway during construction

    Sorry I typed up a response a couple of days ago but didn't finish it. Yes we are testing sample materials - concrete and soil/clay etc. are what I am mainly concerned with. I am working for a DOT and as an almost graduate engineer (only a few subjects left), I have been given this project...
  4. Max93

    Engineering standard to determine if DOT has been under/over testing highway during construction

    Hello everyone, I have been given the task of determining whether the DOT I work for has been under/over testing a highway section. I have been referred to Standard E122-09, however this appears to be a standard to determine appropriate sample size to determine a mean based on a single lot...

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