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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).

• 20:38, 6 June 2012 Lisa Hacker talk contribs deleted page New8 Example 1 (content was: 'Five turbine blades were tested for crack propagation. The test units are cyclically stressed and inspected every 100,000 cycles for crack length. Failu…' (and the only contributor was 'Steve Sharp'))
• 20:38, 6 June 2012 Lisa Hacker talk contribs deleted page New3 Foreword (content was: 'This reference has been designed to introduce the reader to system reliability, maintainability and throughput concepts and theory. The treatment of the s…' (and the only contributor was 'Steve Sharp'))
• 20:38, 6 June 2012 Lisa Hacker talk contribs deleted page The Lognormal Conditional Reliability (content was: 'The lognormal conditional reliability function is given by: ::<math>R(t|T)=\frac{R(T+t)}{R(T)}=\frac{\int_{\text{ln}(T+t)}^{\infty }\tfrac{1}{{{\sigma }…' (and the only contributor was 'Steve Sharp'))
• 20:34, 6 June 2012 Lisa Hacker talk contribs deleted page Weibull Probability Density Function (content was: '== The Three-Parameter Weibull Distribution == The three-parameter Weibull ''pdf'' is given by: ::<math> f(T)={ \frac{\beta }{\eta }}\left( {\frac{T-\g…' (and the only contributor was 'Steve Sharp'))
• 20:34, 6 June 2012 Lisa Hacker talk contribs deleted page Analysis of Non-Homogeneous Warranty Data (content was: 'In the previous sections and examples it is important to note that the underlying assumption was that the population was homogeneous. In other words, all …' (and the only contributor was 'Steve Sharp'))
• 20:31, 6 June 2012 Lisa Hacker talk contribs deleted page New8 Solution to Example 1 (content was: 'The first step is to solve the equation <math>y=b\cdot {{e}^{a\cdot x}}</math> for <math>a</math> and <math>b</math> for each of the test units. Usi…' (and the only contributor was 'Steve Sharp'))
• 20:30, 6 June 2012 Lisa Hacker talk contribs deleted page ALT APP A (content was: '=Reference Appendix A: Brief Statistical Background= <br> In this appendix we attempt to provide a brief elementary introduction to the most common and fundamental statistical equations and definitions used in reliability engineering and…')
• 20:29, 6 June 2012 Lisa Hacker talk contribs deleted page User Guide Chapter: Plots (content was: '=ALTA Plots= Plots are available in Standard Folios and Degradation Analysis Folios as well as in Stress Profiles and in SimuMatic. In all cases, these plots can be viewed by clicking the 'Plot' icon located on the Main page of the Cont…')
• 20:29, 6 June 2012 Lisa Hacker talk contribs deleted page New Example 16 (content was: 'A hinge is made up of four components A, B, C, D. Seven units of each component were taken from the assembly line and the following measurements (in cm) …' (and the only contributor was 'Steve Sharp'))
• 20:28, 6 June 2012 Lisa Hacker talk contribs deleted page Simple Actuarial Method (content was: 'The simple actuarial method is an easy-to-use form of nonparametric data analysis that can be used for multiply censored data that are arranged in interva…' (and the only contributor was 'Steve Sharp'))
• 20:28, 6 June 2012 Lisa Hacker talk contribs deleted page Understanding Quantitative Accelerated Life Data Analysis (content was: 'In typical life data analysis one determines, through the use of statistical distributions, a life distribution that describes the times-to-failure of a p…' (and the only contributor was 'Steve Sharp'))
• 20:28, 6 June 2012 Lisa Hacker talk contribs deleted page Chapter 3: Accelerated Life Testing (content was: '=Sections= #Understanding Quantitative Accelerated Life Data Analysis #Stress Loading' (and the only contributor was 'Steve Sharp'))
• 20:27, 6 June 2012 Lisa Hacker talk contribs deleted page New21 Example 1 (content was: 'To illustrate the principles behind accelerated testing, consider the following simple example which involves a paper clip and can be easily and independe…' (and the only contributor was 'Steve Sharp'))
• 20:26, 6 June 2012 Lisa Hacker talk contribs deleted page Total Cost (content was: 'For a given reliability ''R'', the expected total cost is given by ::<math>\text{Total Cost}\left(R\right) = \text{Lost Sales Cost}\left(R\right) + \tex…' (and the only contributor was 'Steve Sharp'))
• 20:26, 6 June 2012 Lisa Hacker talk contribs deleted page New Simulation Tools In Weibull++ (content was: 'Monte Carlo simulation can be used to perform simple relationship-based simulations. The new `User Defined' distribution feature allows you to specify an …' (and the only contributor was 'Steve Sharp'))
• 20:26, 6 June 2012 Lisa Hacker talk contribs deleted page Variance/Covariance Matrix (content was: 'The variances and covariances of the parameters are estimated from the inverse local Fisher matrix, as follows: ::<math>\begin{align} & \left( \begi…' (and the only contributor was 'Steve Sharp'))
• 20:25, 6 June 2012 Lisa Hacker talk contribs deleted page Characteristics of the Logistic Distribution (content was: '::• The logistic distribution has no shape parameter. This means that the logistic <math>pdf</math> has only one shape, the bell shape, and this shape…' (and the only contributor was 'Steve Sharp'))
• 20:25, 6 June 2012 Lisa Hacker talk contribs deleted page Manufacturing Cost (content was: 'Manufacturing cost is a function of total market value, market share, and manufacturing cost per unit. The function \(f_{2}\left(x\right)\) for manufactur…' (and the only contributor was 'Steve Sharp'))
• 20:25, 6 June 2012 Lisa Hacker talk contribs deleted page New21 Example 2 (content was: 'Twelve electronic devices were put into a continuous accelerated test. The accelerated stresses were temperature and voltage, with use level conditions of…' (and the only contributor was 'Steve Sharp'))
• 20:24, 6 June 2012 Lisa Hacker talk contribs deleted page A Logistic Distribution Example (content was: 'The lifetime of a mechanical valve is known to follow a logistic distribution. Ten units were tested for 28 months and the following months-to-failure dat…' (and the only contributor was 'Steve Sharp'))
• 20:24, 6 June 2012 Lisa Hacker talk contribs deleted page Loglogistic Probability Density Function (content was: 'The loglogistic distribution is a two-parameter distribution with parameters <math>\mu </math> and <math>\sigma </math> . The <math>pdf</math> for th…' (and the only contributor was 'Steve Sharp'))
• 20:24, 6 June 2012 Lisa Hacker talk contribs deleted page ALT Chapter14 (content was: '=General Examples & Case Studies= In this chapter we present some application examples utilizing ReliaSoft's ALTA and ALTA PRO. We assume that you have previously consulted the ALTA User's Guide and familiarized yourself with the softwar…')
• 20:23, 6 June 2012 Lisa Hacker talk contribs deleted page ALT Chapter11 (content was: '=Multivariable Relationships: General Log-Linear and Proportional Hazards= <br> ==Introduction== <br> So far in this reference the life-stress relationships presented have been either single stress relationships (Chapters 6, 7, and 8) or…')
• 20:22, 6 June 2012 Lisa Hacker talk contribs deleted page New5 Bounds on Reliability (content was: 'The reliability of the Gumbel distribution is given by: ::<math>\widehat{R}(T;\hat{\mu },\hat{\sigma })={{e}^{-{{e}^{{\hat{z}}}}}}</math> where: ::<…' (and the only contributor was 'Steve Sharp'))
• 20:22, 6 June 2012 Lisa Hacker talk contribs deleted page Mixed Weibull, Other Uses (content was: '====Reliability Bathtub Curves==== A reliability bathtub curve is nothing more than the graph of the failure rate versus time, over the life of the produc…' (and the only contributor was 'Steve Sharp'))
• 20:21, 6 June 2012 Lisa Hacker talk contribs deleted page Appendix 6.A: Arrhenius Confidence Bounds (content was: '==Approximate Confidence Bounds for the Arrhenius-Exponential== <br> There are different methods for computing confidence bounds. ALTA utilizes confidence bounds that are based on the asymptotic theory for maximum likelihood estimates, m…')
• 20:21, 6 June 2012 Lisa Hacker talk contribs deleted page ALT Chapter9 (content was: '=Temperature-Humidity Relationship= <br> ==Introduction== <br> The Temperature-Humidity (T-H) relationship, a variation of the Eyring relationship, has been proposed for predicting the life at use conditions when temperature and humid…')
• 20:20, 6 June 2012 Lisa Hacker talk contribs deleted page New Expected Failure Time Plots (content was: 'One of the new features in Weibull++ 8 is the Expected Failure Time Calculation (EFTC) tool. Given the population size and the failure time distribution \…' (and the only contributor was 'Steve Sharp'))
• 20:19, 6 June 2012 Lisa Hacker talk contribs deleted page The Loglogistic Reliability Function (content was: 'The reliability for a mission of time <math>T</math> , starting at age 0, for the loglogistic distribution is determined by: ::<math>R=\frac{1}{1+{{e}^{…' (and the only contributor was 'Steve Sharp'))
• 20:19, 6 June 2012 Lisa Hacker talk contribs deleted page The Loglogistic Reliable Life (content was: 'The logistic reliable life is: ::<math>\mathop{T_{R}}={{e}^{\mu +\sigma [\ln (1-R)-\ln (R)]}}</math>' (and the only contributor was 'Steve Sharp'))
• 20:19, 6 June 2012 Lisa Hacker talk contribs deleted page The Gumbel Reliable Life (content was: 'The Gumbel reliable life is given by: ::<math>\mathop{{{T}_{R}}=\mu +\sigma [\ln (-\ln (R))]}</math>' (and the only contributor was 'Steve Sharp'))
• 20:18, 6 June 2012 Lisa Hacker talk contribs deleted page New5 Bounds on Time (content was: 'The bounds around time for a given Gumbel percentile (unreliability) are estimated by first solving the reliability equation with respect to time, as foll…' (and the only contributor was 'Steve Sharp'))
• 20:18, 6 June 2012 Lisa Hacker talk contribs deleted page New 6 Introduction (content was: 'Non-parametric recurrence data analysis provides a nonparametric graphical estimate of the mean cumulative number or cost of recurrence per unit versus ag…' (and the only contributor was 'Steve Sharp'))
• 20:18, 6 June 2012 Lisa Hacker talk contribs deleted page Example 4 (content was: 'The following table gives the failure times of the air-condition unit of an aircraft. The observation is ended by the time of the last failure [3]. ::<m…' (and the only contributor was 'Steve Sharp'))
• 20:18, 6 June 2012 Lisa Hacker talk contribs deleted page Solution to Example 4 (content was: 'Enter the data into a Parametric RDA Specialized Folio in Weibull++. Choose 3 under Parameters and Type I under Settings. Keep the default simulation sett…' (and the only contributor was 'Steve Sharp'))
• 20:17, 6 June 2012 Lisa Hacker talk contribs deleted page New The Mixed Weibull Distribution (content was: '= Sections = #New Other Distributions #Mixed Weibull Distribution #Background #Mixed Weibull Parameter Estimation #Mixed Weibull, Other …' (and the only contributor was 'Steve Sharp'))
• 20:17, 6 June 2012 Lisa Hacker talk contribs deleted page New3 Bounds on Time (content was: 'The bounds around time for a given logistic percentile (unreliability) are estimated by first solving the reliability equation with respect to time as fol…' (and the only contributor was 'Steve Sharp'))
• 20:16, 6 June 2012 Lisa Hacker talk contribs deleted page New5 Probability Paper (content was: 'The form of the Gumbel probability paper is based on a linearization of the <math>cdf</math> . From Eqn. (UnrGumbel): ::<math>\mathop{z=\ln (-\ln (1-F)…' (and the only contributor was 'Steve Sharp'))
• 20:16, 6 June 2012 Lisa Hacker talk contribs deleted page New21 Distributions (content was: 'A statistical distribution is fully described by its <math>pdf</math> (probability density function). In the previous sections, we used the definition o…' (and the only contributor was 'Steve Sharp'))
• 20:16, 6 June 2012 Lisa Hacker talk contribs deleted page Foreword (content was: 'This reference has been designed to accompany ReliaSoft's Accelerated Life Test Analysis software packages, ALTA 7 Standard and ALTA 7 PRO. The treatment …' (and the only contributor was 'Steve Sharp'))
• 20:15, 6 June 2012 Lisa Hacker talk contribs deleted page Chapter 1: Introduction (content was: '=Sections= #Foreword #Modifications and Enhancements #About This Reference' (and the only contributor was 'Steve Sharp'))
• 20:15, 6 June 2012 Lisa Hacker talk contribs deleted page New21 Example 9 (content was: 'An electronic component was subjected to a voltage stress, starting at 2V (use stress level) and increased to 7V in stepwise increments. The following ste…' (and the only contributor was 'Steve Sharp'))
• 20:15, 6 June 2012 Lisa Hacker talk contribs deleted page New21 Example 4 (content was: 'A tensile component of a landing gear was put through an accelerated reliability test to determine whether the life goal would be achieved under the desig…' (and the only contributor was 'Steve Sharp'))
• 20:14, 6 June 2012 Lisa Hacker talk contribs deleted page Probability Paper (content was: 'The form of the Logistic probability paper is based on linearizing the <math>cdf</math> . From Eqn. (UnR fcn), <math>z</math> can be calculated as a f…' (and the only contributor was 'Steve Sharp'))
• 20:14, 6 June 2012 Lisa Hacker talk contribs deleted page Analysis of Censored Data (content was: 'So far we have discussed parameter estimation methods for complete data only. We will expand on that approach in this section by including the maximum lik…' (and the only contributor was 'Steve Sharp'))
• 20:14, 6 June 2012 Lisa Hacker talk contribs deleted page New Life Distributions (content was: 'center|200x200px')
• 20:13, 6 June 2012 Lisa Hacker talk contribs deleted page A Loglogistic Distribution Example (content was: 'Determine the loglogistic parameter estimates for the data given in Table 10.3. ::::<math>\overset{{}}{\mathop{\text{Table 10}\text{.3 - Test data}}}</m…' (and the only contributor was 'Steve Sharp'))
• 20:13, 6 June 2012 Lisa Hacker talk contribs deleted page Apporximating the System CDF (content was: '#REDIRECT Approximating the System CDF' (and the only contributor was 'Steve Sharp'))
• 20:12, 6 June 2012 Lisa Hacker talk contribs deleted page Solution to Example 1 (content was: 'The MCF estimate is obtained as follows: ::<math>\begin{matrix} ID & Months ({{t}_{i}}) & State & {{r}_{i}} & 1/{{r}_{i}} & {{M}^{*}}({{t}_{i}}) \\ …' (and the only contributor was 'Steve Sharp'))
• 20:12, 6 June 2012 Lisa Hacker talk contribs deleted page The GRP Model (content was: 'In this model, the concept of virtual age is introduced. Denote by <math>{{t}_{1}},{{t}_{2}},\cdots ,{{t}_{n}}</math> the successive failure times and l…' (and the only contributor was 'Steve Sharp'))