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Combined display of all available logs of ReliaWiki. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

• 16:04, 7 June 2012 Lisa Hacker talk contribs deleted page New3 Bounds on Reliability (content was: 'The reliability of the logistic distribution is: ::<math>\widehat{R}=\frac{1}{1+{{e}^{\widehat{z}}}}</math> where: ::<math>\widehat{z}=\frac{T-\wideh…' (and the only contributor was 'Steve Sharp'))
• 16:04, 7 June 2012 Lisa Hacker talk contribs deleted page Mean, Median and Mode (content was: 'The mean of the loglogistic distribution, <math>\overline{T}</math> , is given by: ::<math>\overline{T}={{e}^{\mu }}\Gamma (1+\sigma )\Gamma (1-\sigma …' (and the only contributor was 'Steve Sharp'))
• 16:04, 7 June 2012 Lisa Hacker talk contribs deleted page The Standard Deviation (content was: 'The standard deviation of the loglogistic distribution, <math>{{\sigma }_{T}}</math> , is given by: ::<math>{{\sigma }_{T}}={{e}^{\mu }}\sqrt{\Gamma (1…' (and the only contributor was 'Steve Sharp'))
• 16:03, 7 June 2012 Lisa Hacker talk contribs deleted page The Loglogistic Failure Rate Function (content was: 'The loglogistic failure rate is given by: ::<math>\lambda (T)=\frac{{{e}^{z}}}{\sigma T(1+{{e}^{z}})}</math>' (and the only contributor was 'Steve Sharp'))
• 15:42, 7 June 2012 Lisa Hacker talk contribs deleted page New4 Bounds on the Parameters (content was: 'The lower and upper bounds on the mean, <math>{\mu }'</math> , are estimated from: ::<math>\begin{align} & \mu _{U}^{\prime }= & {{\widehat{\mu }}^{\…' (and the only contributor was 'Steve Sharp'))
• 15:41, 7 June 2012 Lisa Hacker talk contribs deleted page New4 Bounds on Reliability (content was: 'The reliability of the logistic distribution is: ::<math>\widehat{R}=\frac{1}{1+\exp (\widehat{z})}</math> where: ::<math>\widehat{z}=\frac{{T}'-\wi…' (and the only contributor was 'Steve Sharp'))
• 15:41, 7 June 2012 Lisa Hacker talk contribs deleted page The Gumbel Probability Density Function (content was: 'The <math>pdf</math> of the Gumbel distribution is given by: ::<math>f(T)=\frac{1}{\sigma }{{e}^{z-{{e}^{z}}}}</math> ::<math>f(T)\ge 0,\sigma >0</…' (and the only contributor was 'Steve Sharp'))
• 15:41, 7 June 2012 Lisa Hacker talk contribs deleted page The Gumbel Mean, Median and Mode (content was: 'The Gumbel mean or MTTF is: ::<math>\overline{T}=\mu -\sigma \gamma </math> where <math>\gamma \approx 0.5772</math> (Euler's constant). The mode of…' (and the only contributor was 'Steve Sharp'))
• 15:40, 7 June 2012 Lisa Hacker talk contribs deleted page The Gumbel Standard Deviation (content was: 'The standard deviation for the Gumbel distribution is given by: ::<math>{{\sigma }_{T}}=\sigma \pi \frac{\sqrt{6}}{6}</math>' (and the only contributor was 'Steve Sharp'))
• 15:40, 7 June 2012 Lisa Hacker talk contribs deleted page The Gumbel Reliability Function (content was: 'The reliability for a mission of time <math>T</math> for the Gumbel distribution is given by: ::<math>R(T)={{e}^{-{{e}^{z}}}}</math> The unreliabilit…' (and the only contributor was 'Steve Sharp'))
• 15:40, 7 June 2012 Lisa Hacker talk contribs deleted page Example 1 (content was: 'A health care company maintains five identical pieces of equipment used by a hospital. When a piece of equipment fails, the company sends a crew to repair…' (and the only contributor was 'Steve Sharp'))
• 15:40, 7 June 2012 Lisa Hacker talk contribs deleted page Solution to Example 2 (content was: 'Using Eq. MCF Var the following table of variance values can be obtained: Using Eqn.(MCF Bounds) and <math>{{K}_{5}}=1.644</math> for a 95% confiden…' (and the only contributor was 'Steve Sharp'))
• 15:39, 7 June 2012 Lisa Hacker talk contribs deleted page New6 Example 3 (content was: 'The following table displays transmission repairs on a sample of 14 cars with manual transmission in a preproduction road test [31]. Here + denotes the ce…' (and the only contributor was 'Steve Sharp'))
• 15:39, 7 June 2012 Lisa Hacker talk contribs deleted page New7 Confidence Bounds (content was: 'In general, in order to obtain the virtual age, the exact occurrence time of each event (failure) should be available, see Eqns.(Type I) and (Type 2). How…' (and the only contributor was 'Steve Sharp'))
• 15:39, 7 June 2012 Lisa Hacker talk contribs deleted page Warranty Prediction (content was: 'Once a life data analysis has been performed on warranty data, this information can be used to predict how many warranty returns there will be in subseque…' (and the only contributor was 'Steve Sharp'))
• 15:39, 7 June 2012 Lisa Hacker talk contribs deleted page Example 13 (content was: 'From Meeker & Escobar [27], the following table gives failure times for an electric component that has two failure modes. One failure mode is due to rand…' (and the only contributor was 'Steve Sharp'))
• 15:38, 7 June 2012 Lisa Hacker talk contribs deleted page Solution to Example 13 (content was: 'We will begin by performing a Weibull analysis of the voltage spike ( <math>V</math> ) failure mode. In order to do this, we must consider all of the fail…' (and the only contributor was 'Steve Sharp'))
• 15:38, 7 June 2012 Lisa Hacker talk contribs deleted page Example 15 (content was: 'The following data represent the times-to-failure for a product. Certain modifications were made to this product in order to improve its reliability. Re…' (and the only contributor was 'Steve Sharp'))
• 15:38, 7 June 2012 Lisa Hacker talk contribs deleted page New Stress Strength Analysis (content was: 'Using the same idea as illustrated in the previous section, one could determine the probability of failure based on the probability of stress exceeding st…' (and the only contributor was 'Steve Sharp'))
• 15:38, 7 June 2012 Lisa Hacker talk contribs deleted page New Solution to Example 16 (content was: 'The parts dimensions measurements were entered into a Weibull++ standard folio as separate data sheets and were analyzed assuming normal distribution and …' (and the only contributor was 'Steve Sharp'))
• 15:37, 7 June 2012 Lisa Hacker talk contribs deleted page Warranty Cost (content was: 'Warranty cost is a function of total market value, market share, reliability, and cost per failure. The function of cost per failure \(f_{4}\left(x\right)…' (and the only contributor was 'Steve Sharp'))
• 15:37, 7 June 2012 Lisa Hacker talk contribs deleted page Determining System Performance (content was: 'The values of system reliability ''R'', confidence level ''CL'', number of units tested ''n'', and number of failures ''r'' are related by the equation :…' (and the only contributor was 'Steve Sharp'))
• 15:35, 7 June 2012 Lisa Hacker talk contribs deleted page Regarding BlockSim's the Random Number Generator (RNG) (content was: '#REDIRECT Regarding BlockSim's Random Number Generator (RNG)' (and the only contributor was 'Steve Sharp'))
• 15:35, 7 June 2012 Lisa Hacker talk contribs deleted page Stress Loading (content was: 'The discussion of accelerated life testing analysis thus far has included the assumption that the stress loads applied to units in an accelerated test hav…' (and the only contributor was 'Steve Sharp'))
• 15:35, 7 June 2012 Lisa Hacker talk contribs deleted page Appendix 8A: IPL Confidence Bounds (content was: '==Approximate Confidence Bounds on IPL-Exponential== <br> ===Confidence Bounds on the Mean Life=== <br> From the inverse power law relationship the mean l…' (and the only contributor was 'Steve Sharp'))
• 15:35, 7 June 2012 Lisa Hacker talk contribs deleted page Example 6 (content was: 'ACME manufacturing has implemented an accelerated testing program for their new design. A total of 40 units were tested at four different pressure levels.…' (and the only contributor was 'Steve Sharp'))
• 15:34, 7 June 2012 Lisa Hacker talk contribs deleted page Example 11 (content was: 'A sample of and electronic device was tested in two testing chambers set at different temperatures and monitored on a weekly basis. The test was perfromed…' (and the only contributor was 'Steve Sharp'))
• 15:34, 7 June 2012 Lisa Hacker talk contribs deleted page Initial Parameter Estimation (content was: 'As a preliminary step, we need to provide a crude estimate of the Weibull parameters for this data. To begin, we will extract the exact times-to-failure: …' (and the only contributor was 'Steve Sharp'))
• 15:33, 7 June 2012 Lisa Hacker talk contribs deleted page New ReliaSoft's Alternate Ranking Method (content was: '= Sections = #ReliaSoft's Alternate Ranking Method (RRM) Step-by-Step Example #Initial Parameter Estimation #Results' (and the only contributor was 'Steve Sharp'))
• 15:05, 7 June 2012 Lisa Hacker talk contribs deleted page Expenential Probability Density Function (content was: '====The Two-Parameter Exponential Distribution==== The two-parameter exponential <math>pdf</math> is given by: ::<math>f(T)=\lambda {{e}^{-\lambda (T-\ga…' (and the only contributor was 'Steve Sharp'))
• 15:04, 7 June 2012 Lisa Hacker talk contribs deleted page New The Exponential Distribution (content was: 'The exponential distribution is a commonly used distribution in reliability engineering. Mathematically, it is a fairly simple distribution, which many ti…' (and the only contributor was 'Steve Sharp'))
• 15:04, 7 June 2012 Lisa Hacker talk contribs deleted page Background (content was: 'Consider a life test of identical components. The components were placed in a test at age <math>T=0</math> and were tested to failure, with their times…' (and the only contributor was 'Steve Sharp'))
• 15:03, 7 June 2012 Lisa Hacker talk contribs deleted page Characteristics of the Generalized Gamma Distribution (content was: 'As mentioned previously, the generalized gamma distribution includes other distributions as special cases based on the values of the parameters. ::• T…' (and the only contributor was 'Steve Sharp'))
• 15:03, 7 June 2012 Lisa Hacker talk contribs deleted page Characteristics of the Gamma Distributions (content was: 'Some of the specific characteristics of the gamma distribution are the following: For <math>k>1</math> : ::• As <math>T\to 0,\infty </math> , <mat…' (and the only contributor was 'Steve Sharp'))
• 15:02, 7 June 2012 Lisa Hacker talk contribs deleted page A Gamma Distribution Example (content was: 'Twenty four units were reliability tested and the following life test data were obtained: ::<math>\begin{matrix} \text{61} & \text{50} & \text{67} & …' (and the only contributor was 'Steve Sharp'))
• 15:02, 7 June 2012 Lisa Hacker talk contribs deleted page New The Gamma Distribution (content was: 'The gamma distribution is a flexible life distribution model that may offer a good fit to some sets of failure data. It is not, however, widely used as a …' (and the only contributor was 'Steve Sharp'))
• 15:02, 7 June 2012 Lisa Hacker talk contribs deleted page New4 Bounds on Time (content was: 'The bounds around time for a given loglogistic percentile, or unreliability, are estimated by first solving the reliability equation with respect to time,…' (and the only contributor was 'Steve Sharp'))
• 20:44, 6 June 2012 Lisa Hacker talk contribs deleted page Analysis of Right Censored (Suspended) Data (content was: '====Background==== All available data should be considered in the analysis of times-to-failure data. This includes the case when a particular unit in a s…' (and the only contributor was 'Steve Sharp'))
• 20:43, 6 June 2012 Lisa Hacker talk contribs deleted page New Life Data Classification (content was: '= Sections = #Data & Data Types #Analysis of Right Censored (Suspended) Data' (and the only contributor was 'Steve Sharp'))
• 20:42, 6 June 2012 Lisa Hacker talk contribs deleted page SYS Chapter10 (content was: '=Fault Tree Diagrams and System Analysis= BlockSim allows system modeling using both Reliability Block Diagrams (RBDs) and Fault Trees. This chap…' (and the only contributor was 'Nicolette Young'))
• 20:42, 6 June 2012 Lisa Hacker talk contribs deleted page SYS Chapter9 (content was: '=Additional Analyses= ==Throughput Analysis== In the prior sections, we concentrated on failure and repair actions of a system. In doing so, we v…' (and the only contributor was 'Nicolette Young'))
• 20:41, 6 June 2012 Lisa Hacker talk contribs deleted page SYS Chapter8 (content was: '=Repairable Systems Analysis Through Simulation= <br> Having introduced some of the basic theory and terminology for repairable systems in Chapter…' (and the only contributor was 'Nicolette Young'))
• 20:41, 6 June 2012 Lisa Hacker talk contribs deleted page SYS Chapter6 (content was: '=Reliability Importance and Optimized Reliability Allocation (Analytical)= ==Component Reliability Importance== ===Static Reliability Importance==…' (and the only contributor was 'Nicolette Young'))
• 20:40, 6 June 2012 Lisa Hacker talk contribs deleted page SYS Chapter5 (content was: '=Time-Dependent System Reliability (Analytical)= <br> <br> <br> <br> In the previous chapter, different system configuration types were examined, …' (and the only contributor was 'Nicolette Young'))
• 20:40, 6 June 2012 Lisa Hacker talk contribs deleted page SYS Chapter4 (content was: '=RBDs and Analytical System Reliability= <br> An overall system reliability prediction can be made by looking at the reliabilities of the componen…' (and the only contributor was 'Nicolette Young'))
• 20:40, 6 June 2012 Lisa Hacker talk contribs deleted page SYS Chapter1 (content was: '=Introduction= ==Foreword== This reference has been designed to introduce the reader to system reliability, maintainability and throughput concepts and theory. It accompanies ReliaSoft's system reliability and availability analysis so…')
• 20:39, 6 June 2012 Lisa Hacker talk contribs deleted page Example 9 (content was: 'A group of 20 units are put on a life test with the following results. ::<math>\begin{matrix} Number & State & State \\ in State & (F or S) & End…' (and the only contributor was 'Steve Sharp'))
• 20:39, 6 June 2012 Lisa Hacker talk contribs deleted page The Gumbel Failure Rate Function (content was: 'The instantaneous Gumbel failure rate is given by: ::<math>\lambda =\frac{{{e}^{z}}}{\sigma }</math>' (and the only contributor was 'Steve Sharp'))
• 20:39, 6 June 2012 Lisa Hacker talk contribs deleted page Solution to Example 9 (content was: 'Using the data and Eqn. (kapmeier), the following table can be constructed: ::<math>\begin{matrix} State & Number of & Number of & Available & {} & …' (and the only contributor was 'Steve Sharp'))
• 20:39, 6 June 2012 Lisa Hacker talk contribs deleted page Failure Modes Configurations (content was: '==== Series Configuration==== The basic competing failure modes configuration, which has already been discussed, is a series configuration. In a series c…' (and the only contributor was 'Steve Sharp'))