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  1. #1

    QC for Hardware...

    Hi All,

    Can some one explain about QC for Hardware.
    A brief idea...



  2. #2
    Moderator JakeBrake's Avatar
    Join Date
    Dec 2000
    St. Louis - Year 2025

    Re: QC for Hardware...

    One must understand what purpose the hardware will serve and in what environment it will serve. Assuming supplier contracts and computing hardware... some examples:

    In an industrial application:
    Typically must meet specifications in the following categories:
    Shock and vibration,
    Temperature and humidity,


  3. #3

    Re: QC for Hardware...

    It is better called Statistical Quality Control (SQC) as that is what advocates like Deming and Juran advocate and for good reason - about which more in a moment. The idea is that strict QC or SQC consists of a set of techniques for measuring process performance, finding variance within that process (either via inspection, sampling, auditing, etc.) that is unacceptable, and applying corrective actions. The "process" I am speaking about here can be the development of software or an assembly line that makes cars.

    To that extent you can see how Quality Control (QC) and Quality Testing (QT) could be seen to differ. QC is more the "monitor-and-assess" whereas QT is more the "find-and-isolate". However, those two things can go hand-in-hand quite easily which is why strict distinctions between QC and QT can be problematic. So shock testing, vibration testing, thermal testing, circuit testing, etc. are just that: testing methods. They are not really control methods. However, the monitoring and assessing of the results of those testing methods is certainly part of quality control. Likewise, things like MTBF (Mean-Time-Between-Failure) and MTTR (Mean-Time-To-Repair) are really more reliability prediction and actuation measures, not strict quality control.

    Remember that QC is best thought of as SQC because it keeps in mind that the whole point of QC is the measurement and evaluation of variation within a process, and the efforts made to limit (or "control") such variation such that quality is maintained. The idea is to control the performance of a process, not so much the quality of a product. That is a distinction many fail to realize.




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