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  2. Cascade chart (NDI interval reliability) - Wikipedia

    en.wikipedia.org/wiki/Cascade_chart_(NDI...

    The probability of detection (POD), a function of the NDI method, accessibility, and crack size, can be modeled by the equation below. = {() / ()} In this equation, a 0 is defined as the crack size below which detection is impossible.

  3. Cumulant - Wikipedia

    en.wikipedia.org/wiki/Cumulant

    The cumulants satisfy a recursion formula + = (). The geometric distributions , (number of failures before one success with probability p of success on each trial). The cumulant generating function is K ( t ) = log( p / (1 + ( p − 1)e t )) .

  4. CUSUM - Wikipedia

    en.wikipedia.org/wiki/CUSUM

    In statistical quality control, the CUSUM (or cumulative sum control chart) is a sequential analysis technique developed by E. S. Page of the University of Cambridge. It is typically used for monitoring change detection. [1] CUSUM was announced in Biometrika, in 1954, a few years after the publication of Wald's sequential probability ratio test ...

  5. Survival function - Wikipedia

    en.wikipedia.org/wiki/Survival_function

    If time can take on any positive value, then the cumulative distribution function F(t) is the integral of the probability density function f(t). For the air-conditioning example, the graph of the CDF below illustrates that the probability that the time to failure is less than or equal to 100 hours is 0.81 , as estimated using the exponential ...

  6. Failure rate - Wikipedia

    en.wikipedia.org/wiki/Failure_rate

    Cumulative distribution function for the exponential distribution, often used as the cumulative failure function (). To accurately model failures over time, a cumulative failure distribution , F ( t ) {\displaystyle F(t)} must be defined, which can be any cumulative distribution function (CDF) that gradually increases from 0 {\displaystyle 0 ...

  7. Probability of kill - Wikipedia

    en.wikipedia.org/wiki/Probability_of_kill

    Additional factors include the probability of detection (P d), reliability of the targeting system (R sys), and reliability of the weapon (R w), to name a few. For example, if a missile operates properly e.g. 90% of the time (assuming a good shot), the targeting system operates properly 85% of the time, and enemy targets are detected at 50% ...

  8. Cumulative frequency analysis - Wikipedia

    en.wikipedia.org/wiki/Cumulative_frequency_analysis

    Cumulative frequency distribution, adapted cumulative probability distribution, and confidence intervals. Cumulative frequency analysis is the analysis of the frequency of occurrence of values of a phenomenon less than a reference value. The phenomenon may be time- or space-dependent. Cumulative frequency is also called frequency of non-exceedance.

  9. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is [ 2 ] [ 3 ] f ( x ) = 1 2 π σ 2 e − ( x − μ ) 2 2 σ 2 . {\displaystyle f(x)={\frac {1}{\sqrt {2\pi \sigma ^{2 ...