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  • Screening designs for continuous and categorical factors

    Authors Bradley Jones (1), Ryan Lekivetz (2), Dibyen Majumdar (3) & Christopher Nachtsheim (4) Affiliations (1) Adsurgo LLC, Cary, NC (2) JMP Statistical Discovery LLC (3) Department of Mathematics, Statistics, and Computer Science, University of Illinois, Chicago, Chicago, IL (4) Carlson School of Management, University of Minnesota, Minneapolis, MN Journal Technometrics, VOL. 67, NO. 1, 1–10 Dat...

    Ryan_Lekivetz Ryan_Lekivetz
    Publications |
    Jan 29, 2026 3:01 PM
    60 views | 0 replies

  • An Empirical Semiparametric One-sided Confidence Bound for Lower Quantiles of Distributions with Positive Support

    Authors Caleb King (1), Peter Parker (2), Derek Young (3) Affiliations (1) JMP Statistical Discovery, (2) NASA, (3) University of Kentucky Journal Quality and Reliability Engineering International Date Published December 2023 Abstract In many industries, the reliability of a product is often determined by a quantile of a distribution of a product's characteristics meeting a specified requirement. ...

    calking calking
    Publications |
    Dec 15, 2023 6:28 AM
    662 views | 0 replies

  • On the Testing of Statistical Software

    Authors Ryan Lekivetz (1), Joseph Morgan (1) Affiliations (1) JMP Statistical Discovery Journal Journal of Statistical Theory and Practice, vol. 15, no. 4 Date Published 2021 Abstract Testing statistical software is an extremely difficult task. What is more, for many statistical packages, the developer and test engineer are one and the same, may not have formal training in software testing techni...

    JosephMorgan JosephMorgan
    Publications |
    Nov 16, 2023 11:18 AM
    660 views | 0 replies

  • Residual fault density prediction using regression methods

    Authors Joseph Morgan (1), George Knafl (2) Affiliations (1) JMP Statistical Discovery (2) DePaul University Journal Proceedings of ISSRE'96: 7th International Symposium on Software Reliability Engineering Date Published 1996 Abstract Regression methods are used to model residual fault density in terms of several product and testing process measures. Process measures considered include discovered ...

    JosephMorgan JosephMorgan
    Publications |
    Nov 16, 2023 11:16 AM
    1226 views | 0 replies

  • Combinatorial Testing

    Authors Joseph Morgan Affiliations JMP Statistical Discovery Journal Wiley StatsRef: Statistics Reference Online Date Published 2020 Abstract Test engineers are often faced with the challenge of selecting test cases that maximize the chance of discovering faults while working within a limited budget. The input space of the system under test (SUT) may be large, or the cost of executing the SUT for ...

    JosephMorgan JosephMorgan
    Publications |
    Nov 15, 2023 12:15 PM
    751 views | 0 replies

  • Estimating Pure-Error from Near Replicates in Design of Experiments

    Authors Caleb King (1), Peter Parker (2), Thomas Bzik (3) Affiliations (1) JMP Statistical Discovery (2) NASA (3) EMD Group Journal Journal of Quality Technology, Volume 54, Issue 1 Date Published 2022 Abstract In design of experiments, setting exact replicates of factor settings enables estimation of pure-error; a model-independent estimate of experimental error useful in communicating inherent s...

    calking calking
    Publications |
    Nov 15, 2023 11:42 AM
    842 views | 0 replies