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Planning for Accelerated Life Tests.

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Title: Planning for Accelerated Life Tests.
Authors: Tang, Loon-Ching
Source: International Journal of Reliability, Quality & Safety Engineering. Jun99, Vol. 6 Issue 3, p265. 11p.
Subjects: Accelerated life testing, Strains & stresses (Mechanics)
Abstract: We present two alternative perspectives to the current way of planning for constantstress accelerated life tests (CSALTs) and step-stress ALT (SSALT). In 3-stress CSALT, we consider test plans that not only optimize the stress levels but also optimize the sample allocation. The resulting allocations also limit the chances of inconsistency when data are plotted on a probability plot. For SSALT, we consider test plans that not only optimize both stress levels and holding times, but also achieve a target acceleration factor that meets the test time constraint with the desirable fraction of failure. The results for both problems suggest that the statistically optimal way to increase acceleration factor in an ALT is to increase lower stress levels and; in the case of CSALT, to decrease their initial sample allocations; in the case of SSALT, to reduce their initial hold times. Both problems are formulated as constrained nonlinear programs. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Reliability, Quality & Safety Engineering is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Planning for Accelerated Life Tests.
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  Data: <searchLink fieldCode="AR" term="%22Tang%2C+Loon-Ching%22">Tang, Loon-Ching</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Accelerated+life+testing%22">Accelerated life testing</searchLink><br /><searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink>
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  Data: We present two alternative perspectives to the current way of planning for constantstress accelerated life tests (CSALTs) and step-stress ALT (SSALT). In 3-stress CSALT, we consider test plans that not only optimize the stress levels but also optimize the sample allocation. The resulting allocations also limit the chances of inconsistency when data are plotted on a probability plot. For SSALT, we consider test plans that not only optimize both stress levels and holding times, but also achieve a target acceleration factor that meets the test time constraint with the desirable fraction of failure. The results for both problems suggest that the statistically optimal way to increase acceleration factor in an ALT is to increase lower stress levels and; in the case of CSALT, to decrease their initial sample allocations; in the case of SSALT, to reduce their initial hold times. Both problems are formulated as constrained nonlinear programs. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Reliability, Quality & Safety Engineering is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1142/S0218539399000255
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 265
    Subjects:
      – SubjectFull: Accelerated life testing
        Type: general
      – SubjectFull: Strains & stresses (Mechanics)
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      – TitleFull: Planning for Accelerated Life Tests.
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            NameFull: Tang, Loon-Ching
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          Dates:
            – D: 01
              M: 09
              Text: Jun99
              Type: published
              Y: 1999
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              Value: 6
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              Value: 3
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            – TitleFull: International Journal of Reliability, Quality & Safety Engineering
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