SDI Utilities
Free software tools to help you create better designs

Distribution Explorer

Distribution Explorer Screenshot

FEATURES

  • Plot various probability distributions (Normal, Exponential, Lognormal, Uniform, Triangular, Weibull)
  • Specify lower and/or upper specification limits and visualize their impacts on the distribution.
  • Specify Target value and see it on the distribution.
  • Automatically calculate the Probability of Non-Compliance (PNC) for areas below the lower specification limit, above the upper specification limit, and total area.
  • Fit mean, standard deviation, skewness, and kurtosis to Johnson SB, Johnson SL, or Johnson SU distribution.
  • Dynamically change the specification limits and their the impact on Probability of Non-Compliance (PNC).
  • See effects of changing skewness and kurtosis on the shape on a probability distribution.

REQUIREMENTS

  • Microsoft Windows 7, 8, or 10

Reliability Test Design

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FEATURES

  • Design a reliability demonstration test using a cumulative binomial approach.
  • Specify Test goal in terms of reliability, BX life, or MTBF.
  • Define distribution (Weibull or Exponential)
  • Select calculated results (Test Time, Test Units, Allowable Failures, or Confidence Level).

REQUIREMENTS

  • Microsoft Windows 7, 8 or 10

PNC / Test Effectiveness Calculator

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FEATURES

  • Calculate true Probability of Non-Compliance (PNC) independent of a measurement system variability.
  • Calculate the total probability of units that pass a test (both good and bad units).
  • Calculate the total probability of units that fail a test (both good and bad units).

REQUIREMENTS

  • Microsoft Windows 7, 8, or 10
  • Microsoft Excel 2007, 2010, or 2013