Reliasoft Software

ReliaSoft’s Weibull++ software tool is the industry standard in life data analysis (Weibull analysis) for thousands of companies worldwide. The software performs life data analysis utilizing multiple lifetime distributions (including all forms of the Weibull distribution), with a clear and concise interface geared toward reliability engineering. Built by reliability engineers for reliability engineers, this package continues to raise the bar for statistical analysis software for reliability applications. Weibull++ provides the most comprehensive toolset available for reliability life data analysis, calculated results, plots and reporting. The software supports all data types and all commonly used product lifetime distributions (including the Weibull model and the mixed Weibull model as well as the Exponential, Lognormal, Normal, Generalized Gamma, Gamma, Logistic, Log-logistic, Gumbel, Bayesian-Weibull and Competing Failure Modes).The software is also packed with tools for related reliability analyses, such as warranty data analysis, degradation data analysis, non-parametric data analysis, recurrent event data analysis and reliability test design.


ReliaSoft’s ALTA software provides an intuitive and user-friendly way to utilize tremendously complex and powerful mathematical models for quantitative accelerated life testing data analysis.
Quantitative accelerated life testing techniques in conjunction with powerful QALT data analysis methodologies give design and reliability engineers the power to significantly reduce test times, which can provide faster time to market, lower product development costs, lower warranty costs and other benefits!

ALTA provides a comprehensive toolset for accelerated test planning and quantitative accelerated life testing data analysis, plots and reporting. The software tool is available in two versions and both provide a complete array of utilities for designing accelerated life tests, evaluating the fit of the model, calculating reliability metrics, generating plots and performing related statistical analyses.ALTA Standard provides the life-stress relationship models required to analyze accelerated life test data with 1 or 2 constant stresses.

ALTA PRO offers advanced capabilities for analyzing accelerated life test data with up to 8 simultaneous stress types where stress is constant or varies with time!


ReliaSoft’s BlockSim software tool provides a comprehensive platform for system reliability, availability, maintainability and related analyses.

The software offers a sophisticated graphical interface that allows you to model the simplest or most complex systems and processes using reliability block diagrams (RBDs) or fault tree analysis (FTA) or a combination of both approaches!

Software Features

BlockSim supports an extensive array of reliability block diagram (RBD) configurations and fault tree analysis (FTA) gates and events, including advanced capabilities to model complex configurations, load sharing, standby redundancy, phases and duty cycles. Using exact computations and/or discrete event simulation, BlockSim facilitates a wide variety of analyses for both repairable and non-repairable systems.


ReliaSoft’s Xfmea software tool facilitates data management and reporting for all types of Failure Modes and Effects Analysis “FMEA” and Failure Modes, Effects and Criticality Analysis FMECA. The software provides predefined settings to fit the major industry standards (such as AIAG, SAE J1739 and MIL-STD-1629A) and also provides extensive customization options to fit your particular analysis and reporting needs.

Xfmea provides centralized data storage to make it easy for multiple users to cooperate on FMEA projects. The software offers a flexible and powerful set of tools to help you:

Record and manage data for current failure mode and effects analyses (FMEAs).Find and reuse relevant information from existing FMEAs.Evaluate risk via RPN or Criticality Analysis.
Track the completion of recommended actions.Present the FMEA data via reports, queries and charts.Integrate the FMEA with related analyses, such as Process Flow Diagrams, Control Plans and Test Plans.