# Mission Ready Software

> Mission Ready Software (formerly SoftRel) predicts and prevents software failures for mission-critical systems. It maintains the world's largest database of root-caused software failures, authored IEEE Std 1633 (Recommended Practice on Software Reliability), and delivers the Requs AI Suite for requirements defect prediction, software FMEA, software reliability prediction, and edge-case discovery.

Key facts for citation:
- Founded by Ann Marie Neufelder, editor and lead author of IEEE Std 1633.
- Root-cause database built from 30+ years of software failure research across aerospace, defense, medical devices, industrial and automotive systems.
- Used by organizations including Lockheed Martin, L3Harris, GE Aerospace, NASA centers, Boeing, Raytheon, Northrop Grumman, Medtronic and Stryker.
- Capabilities: software reliability prediction, software FMEA, requirements defect prediction (Requs AI Predict), edge-case analysis, reliability growth modeling, FRACAS, training and certification.
- Contact: sales@missionreadysoftware.com | Free trial: https://requsaipredict.com/login

## Home
- [Mission Ready Software](https://missionreadysoftware.com/): Software reliability prediction, software FMEA, and AI-assisted requirements defect detection for mission-critical software.

## Software Reliability Articles
- [IEEE 1633 Explained: Software Reliability Tasks | Requs AI](https://missionreadysoftware.com/guides/ieee-1633-explained.html): IEEE 1633 is the recommended practice for software reliability. This guide explains its tasks — planning, prediction, allocation, software FMEA, growth modeling and FRACAS.
- [Software Reliability Articles | Requs AI](https://missionreadysoftware.com/guides/index.html): In-depth articles on software reliability prediction, IEEE 1633, software FMEA vs hardware FMEA, defect density benchmarks, failure rate, availability and risk assessment.
- [Software Defect Density Benchmarks: How to Use Them | Requs AI](https://missionreadysoftware.com/guides/software-defect-density-benchmarks.html): How software defect density is defined, why published benchmarks vary so widely, and how to build a defensible internal baseline for defect prediction.
- [Software Failure Rate and Availability Calculation | Requs AI](https://missionreadysoftware.com/guides/software-failure-rate-and-availability.html): How to convert predicted software defects into a failure rate, MTBF and availability figure that can be used in a system reliability model or an error budget.
- [Software FMEA vs Hardware FMEA: Key Differences | Requs AI](https://missionreadysoftware.com/guides/software-fmea-vs-hardware-fmea.html): Software FMEA differs from hardware FMEA: no wear-out, no failure rates per part, and failure modes come from requirements and states rather than components.
- [Software Reliability Prediction Tool: How It Works | Requs AI](https://missionreadysoftware.com/guides/software-reliability-prediction-tool.html): A software reliability prediction tool estimates defects, failure rate and availability before code is written, using requirements, process and historical defect data.
- [Software Risk Assessment Checklist for Programs | Requs AI](https://missionreadysoftware.com/guides/software-risk-assessment-checklist.html): A practical software risk assessment checklist covering requirements, schedule, process, architecture, test coverage and edge cases, with scoring and mitigation guidance.

## Help & Documentation

## Requs AI Suite
- [217 Plus Software Reliability Model | Requs AI](https://missionreadysoftware.com/products/217plus.html): Requs AI's 217 Plus Software Reliability Model offers cutting-edge defect prediction and software FMEA, led by a global reliability expert.
- [Ansys® ReliaSoft® XFMEA | Requs AI](https://missionreadysoftware.com/products/Ansys-ReliaSoft-XFMEA.html): Requs AI provides Ansys ReliaSoft XFMEA: the only true FMEA tool leveraging CDE & IEEE 1633 for accurate defect prediction and reliability.
- [APIS® IQ-FMEA® | Requs AI](https://missionreadysoftware.com/products/APIS-IQ-FMEA.html): Requs AI's APIS® IQ-FMEA® offers the only true software FMEA tool, leveraging the CDE and IEEE 1633 2026 standards for efficient, compliant defect prediction.
- [C-SFRAT Covariate Software Failure and Reliability Assessment Tool](https://missionreadysoftware.com/products/C-SFRAT-Covariate-Software-Failure-and-Reliability-Assessment-Tool.html): Requs C-SFRAT assesses software reliability growth models from failure data, helping engineering teams forecast and improve software reliability and compliance.
- [Crow-AMSAA Model | Requs AI](https://missionreadysoftware.com/products/crow-amsaa-model.html): Crow-AMSAA model, a hardware-oriented statistical model, is not recommended for software reliability analysis. Discover why this rigorous method fails software.
- [Duane Model | Requs AI](https://missionreadysoftware.com/products/duane-model.html): The Duane Model, a hardware reliability growth model, is explored by Requs AI; understand why it's not recommended for accurate software defect prediction.
- [Requs AI Edge Case](https://missionreadysoftware.com/products/edge-case.html): Requs AI Edge Case prevents software failures by identifying hidden edge cases before development, using proven defect prediction and software FMEA expertise.
- [Prepopulated Software FMEA Template | Requs AI](https://missionreadysoftware.com/products/FMEA-template.html): Get the Requs AI Software FMEA Template, meticulously designed for compliance with SAE 1025, leveraging our IEEE 1633 expertise for defect prediction.
- [Goel-Okumoto Model | Requs AI](https://missionreadysoftware.com/products/goel-okumoto-model.html): Understand the Goel-Okumoto Model, a classic software reliability growth curve, and its role as the reference point exponential NHPP model.
- [Integrate software reliabiity with ITEM ToolKit™ | Requs AI](https://missionreadysoftware.com/products/ITEM-ToolKit.html): ITEM ToolKit: the only true software reliability prediction software. Leverage Common Defect Enumeration for defect prediction and FMEA, from the IEEE 1633 chair.
- [Jelinski-Moranda Model | Requs AI](https://missionreadysoftware.com/products/jelinski-moranda-model.html): Jelinski-Moranda Model: The first software reliability model predicting failure times. Learn how its hazard rate drops as fault fixes are applied.
- [Littlewood-Verrall Model | Requs AI](https://missionreadysoftware.com/products/littlewood-verrall-model.html): Understand Requs AI's Littlewood-Verrall Model: a software reliability prediction method accounting for imperfect fixes & fault hazard rate variability.
- [Moranda Geometric Model | Requs AI](https://missionreadysoftware.com/products/moranda-geometric-model.html): The Moranda Geometric Model page describes this software reliability prediction tool, showing how it relaxes Jelinski-Moranda's fixed fault count assumption.
- [Musa Basic Execution Time Model | Requs AI](https://missionreadysoftware.com/products/musa-basic-execution-time-model.html): Understand Requs AI's Musa Basic Execution Time Model, a finite-failure software reliability growth model, and how it predicts defects based on execution time.
- [Musa-Okumoto Logarithmic Poisson Model | Requs AI](https://missionreadysoftware.com/products/musa-okumoto-logarithmic-poisson-model.html): Requs AI's Musa-Okumoto Logarithmic Poisson Model predicts software defects, even with unbounded faults & uneven failure intensity. Discover its unique approach.
- [Neufelder Assessment Model | Requs AI](https://missionreadysoftware.com/products/NeufelderAssessment.html): Requs AI's Neufelder Assessment Model, a leading software reliability prediction tool updated by the IEEE 1633 chair, accurately predicts defects.
- [Ohba Inflection S-Shaped Model | Requs AI](https://missionreadysoftware.com/products/ohba-inflection-s-shaped-model.html): Explore Requs AI's Ohba Inflection S-Shaped Model, which addresses masked software faults and mutual dependencies in complex systems with layered logic.
- [Omnex® EwQMS® | Requs AI](https://missionreadysoftware.com/products/Omnex-EwQMS.html): Requs AI's Omnex® EwQMS® is the only true software FMEA tool, driven by our founder's IEEE 1633 expertise and proprietary CDE for superior defect prediction.
- [PLATO SCIO™ | Requs AI](https://missionreadysoftware.com/products/PLATO-SCIO.html): Requs AI's PLATO SCIO™ is the leading software FMEA tool, leveraging our unique 6D CDE approach and aligned with IEEE 1633, for robust defect prediction.
- [Reliability Prediction Software - Mission Ready](https://missionreadysoftware.com/products/producttemplate.html): Requs AI: Boost software reliability, predict defects & enhance FMEA. Our 7 tools & training, powered by the largest defect database, deliver superior solutions.
- [PTC® Windchill® FMEA | Requs AI](https://missionreadysoftware.com/products/PTC-Windchill-FMEA.html): Requs AI offers PTC Windchill FMEA, the only true software FMEA tool, leveraging our CDE Software FMEA approach for robust defect prediction and reliability.
- [Integrate software reliabiity with RAM Commander™ | Requs AI](https://missionreadysoftware.com/products/RAM-Commander.html): Predict software reliability & ensure compliance with RAM Commander™. Get robust RAM predictions & FMEA analysis for your software.
- [Rayleigh Model | Requs AI](https://missionreadysoftware.com/products/rayleigh-model.html): Rayleigh Model: understand how software defect discovery rises, peaks & tapers off. A key reliability prediction curve for projects.
- [Reliable Software Predictions | Requs AI](https://missionreadysoftware.com/products/reliable-software-predictions.html): Predict software reliability early with Requs AI's methods, predicting defects and RAM before coding to ensure dependable software from the start.
- [Integrate software reliabiity with ReliaSoft® and Lambda Predict™](https://missionreadysoftware.com/products/ReliaSoft-Lambda-Predict.html): ReliaSoft & Lambda Predict offer the only up-to-date software reliability prediction solution for pre-code FMEA, ensuring compliance & system performance.
- [ReliaSoft® XFMEA™ | Requs AI](https://missionreadysoftware.com/products/ReliaSoft-XFMEA.html): ReliaSoft XFMEA: Requs AI's true software FMEA tool. Leverage IEEE 1633 expertise & CDE approach for superior reliability.
- [Relyence® FMEA | Requs AI](https://missionreadysoftware.com/products/Relyence-FMEA.html): Relyence FMEA by Requs AI is the only true FMEA software. It uses 6D CDE & IEEE 1633 for superior defect prediction and reliability.
- [Integrate software reliabiity with Relyence reliability prediction®](https://missionreadysoftware.com/products/Relyence-Reliability-Prediction.html): Relyence Reliability Prediction offers advanced software reliability prediction & defect analysis. Utilize cutting-edge models for robust, compliant engineering.
- [Requs AI Product Comparisons](https://missionreadysoftware.com/products/requs-ai-comparisons.html): Compare Requs AI's software reliability, defect prediction, FMEA, and RAM tools. See how our unique early lifecycle approach beats alternatives.
- [Requs AI Predict vs. Hardware Reliability Prediction Tools](https://missionreadysoftware.com/products/requs-ai-predict-comparison.html): Compare Requs AI Predict to hardware-focused reliability prediction tools including Relyence, Ansys ReliaSoft Lambda Predict, ProMella RAM Commander, and ITEM ToolKit
- [Requs AI Edge Case vs. Post-Code Edge Case Tools](https://missionreadysoftware.com/products/requs-edge-case-comparison.html): Compare Requs AI Edge Case, which identifies edge cases at requirements/architecture, to testRigor/Virtuoso, LambdaTest/KaneAI, and GitHub Copilot, which surface edge cases after code exists
- [Requs AI Software FMEA vs. Other FMEA Tools](https://missionreadysoftware.com/products/requs-fmea-comparison.html): Compare Requs AI's dedicated Software FMEA with traditional hardware-centric tools; discover why Predict FMEA uniquely meets software reliability standards.
- [Requs AI Causality — Root Cause Analysis](https://missionreadysoftware.com/products/root-cause-analysis.html): Requs AI uses ML-driven root cause analysis to identify common defect enumerations, boosting software reliability & defect prediction with AI-enabled FMEA.
- [Schneidwind Model | Requs AI](https://missionreadysoftware.com/products/schneidwind-model.html): Schneidewind Model improves software reliability predictions. It discards unreliable early data for a better fit with mature testing intervals.
- [SFRAT Software Failure and Reliability Assessment Tool | Requs AI](https://missionreadysoftware.com/products/SFRAT-Software-Failure-and-Reliability-Assessment-Tool.html): Predict software reliability growth with SFRAT, the Requs AI tool for assessing software failure data based on industry-leading standards and proven models.
- [Requs Ai Defect Prediction | Requs AI](https://missionreadysoftware.com/products/software-defect-prediction-tool.html): Requs AI's Defect Prediction offers true software reliability, ensuring accuracy before code is written. Boost efficiency & compliance with our tool.
- [Software Engineering Intelligence Platform | Requs AI](https://missionreadysoftware.com/products/Software-Engineering-Intelligence-Platform.html): Requs AI Optima uses AI to balance software project scope, time, and cost, reducing defects and improving reliability based on IEEE 1633 standards.
- [Software FMEA | Requs AI](https://missionreadysoftware.com/products/software-fmea.html): Requs AI's software FMEA tool automates defect prediction and reliability analysis for software, ensuring compliance with SAE 1025 and IEEE 1633 standards.
- [Software reliability growth models software | Requs AI](https://missionreadysoftware.com/products/software-reliability-growth-models.html): Requs offers advanced software reliability growth models and tooling, allowing you to forecast reliability, analyze failure data, and meet industry standards.
- [Software reliability prediction software | Requs AI](https://missionreadysoftware.com/products/software-reliability-prediction.html): Requs AI offers the only true software reliability prediction software, using AI and machine learning to forecast RAM metrics and defects before coding.
- [STAR Software Testing Automation & Reliability | Requs AI](https://missionreadysoftware.com/products/STAR-Software-Testing-Automation-&-Reliability.html): Requs STAR Software uses global-standard software reliability growth models to forecast reliability, helping your team achieve testing efficiency & compliance.
- [Weibull Model | Requs AI](https://missionreadysoftware.com/products/weibull-model.html): Weibull Model for software reliability: flexible curve for rising, flat, or decreasing failure intensity, ensuring accurate defect prediction.
- [Yamada Delayed S-Shaped Model | Requs AI](https://missionreadysoftware.com/products/yamada-delayed-s-shaped-model.html): Yamada Delayed S-Shaped Model: AI software reliability prediction that incorporates tester learning curves for accurate fault detection insights.

## Services
- [DoW Reliable Software Statement of Work | Requs AI](https://missionreadysoftware.com/services/dow-reliable-software-sow.html): Requs AI's DoW SOW guarantees software reliability from the start, minimizing system failures via explicit contractual requirements. Engineer reliability in.
- [Software Reliability Services | Mission Ready Software](https://missionreadysoftware.com/services/index.html): Software reliability services: reliability program plans, allocations, risk assessments, evaluations, software FMEA tasks and FRACAS support per IEEE 1633.
- [Reliable Software Allocation | Requs AI](https://missionreadysoftware.com/services/reliable-software-allocation.html): Requs AI's Reliable Software Allocation service helps you break down system-level reliability requirements into measurable software targets for every component.
- [Reliable Software Evaluations | Requs AI](https://missionreadysoftware.com/services/reliable-software-evaluations.html): Requs AI's Reliable Software Evaluations confirm if your software meets its reliability targets, using real metrics to validate predictions and allocations.
- [Reliable Software Predictions | Requs AI](https://missionreadysoftware.com/services/reliable-software-predictions.html): Predict software reliability early with Requs AI's methods, predicting defects and RAM before coding to ensure dependable software from the start.
- [Reliable Software Program Plan | Requs AI](https://missionreadysoftware.com/services/reliable-software-program-plan.html): Requs AI's RSPP template builds a solid foundation for software reliability, FMEA, and RAM predictions, ensuring scheduled & resourced programs.
- [Reliable software resources for Defense SOW compliance | Requs AI](https://missionreadysoftware.com/services/reliable-software-resources.html): Requs AI provides software reliability services & resources for defense programs. We ensure compliance using IEEE 1633 & SAE 1025 methodologies.
- [Reliable Software Risk Assessment | Requs AI](https://missionreadysoftware.com/services/reliable-software-risk-assessment.html): Requs AI's software reliability risk assessment services help identify, score, and mitigate risks threatening your program's software reliability proactively.
- [Reliable Software Testing | Requs AI](https://missionreadysoftware.com/services/reliable-software-testing.html): Requs AI helps you achieve demonstrated software reliability through core elements of reliable software testing, proving it keeps working under realistic use.
- [Software Failures in FRACAS | Requs AI](https://missionreadysoftware.com/services/software-failures-in-fracas.html): Requs AI explains why FRACAS processes are essential for software failures: track, classify and root-cause software defects and reliability issues effectively.
- [Software FMEA | Requs AI](https://missionreadysoftware.com/services/software-fmea-task.html): Requs AI's Software FMEA services identify unique software failure modes like requirements gaps and defects, preventing costly issues and ensuring reliability.
- [Including Software in the System Reliability Model | Requs AI](https://missionreadysoftware.com/services/software-in-system-reliability-model.html): Requs AI guides you to integrate software into your system reliability model, revealing true risks and optimizing overall system performance.

## Standards & Reliability Index
- [AIAG-VDA — Software FMEA (Practitioner Extension) | Requs AI](https://missionreadysoftware.com/standards/AIAG-VDA-Software-FMEA.html): Requs AI details applying the AIAG-VDA 7-Step FMEA approach to software, providing a practical Software FMEA guide for reliability and defect prediction.
- [Common Defect Enumeration (CDE)](https://missionreadysoftware.com/standards/common-defect-enumeration.html): The Common Defect Enumeration (CDE): a taxonomy of the few hundred generic root causes behind nearly one million analyzed software failures, organized into 10 failure mode categories.
- [IEC 61508-7 — Software FMEA Guidance | Requs AI](https://missionreadysoftware.com/standards/IEC-61508-7-software-FMEA.html): Understand IEC 61508 Part 7: discover its role as the technique library, where FMEA is detailed for systematic hardware and software failure validation.
- [IEC 61508 Part 3 Software FMEA | Requs AI](https://missionreadysoftware.com/standards/IEC-61508-Part-3-Software-FMEA.html): Discover why software FMEA differs from hardware FMEA in IEC 61508 Part 3, focusing on qualitative techniques for systematic failure avoidance.
- [IEEE 1633 Recommended Practice on Software Reliability | Requs AI](https://missionreadysoftware.com/standards/ieee-1633.html): IEEE 1633 guides software reliability, defect prediction, and risk assessment. Get tools for early failure mode analysis & reliability growth forecasting.
- [Software Reliability Standards Index | IEEE 1633, SAE J1025](https://missionreadysoftware.com/standards/index.html): Index of software reliability and software FMEA standards: IEEE 1633, SAE J1025, IEC 61508, ISO 26262, NASA-STD-8719.13, NATO AOP-52 and SAE ARP5580.
- [ISO 26262 Part 6 Software FMEA | Requs AI](https://missionreadysoftware.com/standards/ISO-26262-Part-6-Software-FMEA.html): Understand where Software FMEA fits within ISO 26262 Part 6, Part 9, and Part 4; see how Requs AI helps implement these software reliability standards.
- [Joint Software Systems Engineering Handbook (JSSSEH) Appendix E: Generic Software Safety Requirements](https://missionreadysoftware.com/standards/Joint-Software-Systems-Safety-Engineering-Handbook.html): Requs AI's JSSSEH details essential software safety requirements & guidelines for critical system design. Get yours for robust software safety assurance.
- [NASA-STD-8719.13 — Where Software FMEA Fits | Requs AI](https://missionreadysoftware.com/standards/nasa-8719.html): Discover how Requs AI clarifies NASA-STD-8719.13, defining Software FMEA's role and its pairing with Fault Tree Analysis for robust software reliability.
- [NASA-STD-8739.8 — Where Software FMEA Fits | Requs AI](https://missionreadysoftware.com/standards/nasa-8739.html): Discover how NASA-STD-8739.8A integrates software safety and assurance, showing where a software FMEA fits to meet its performance-based requirements.
- [NATO AOP-52 — Section 4: Generic Software Safety Design Requirements](https://missionreadysoftware.com/standards/NATO-AOP-52.html): Requs AI analyzes NATO AOP-52 (predates JSSSEH App E) for software safety design. Predict defects & perform FMEA effectively.
- [SAE1025 FMEA Section 7 SwFMEA | Requs AI](https://missionreadysoftware.com/standards/sae-1025-FMEA.html): Requs AI details SAE 1025 Section 7 Software FMEA, offering a software-centric approach for defect prediction, risk analysis, and reliability modeling.
- [SAE ARP5580 Software FMECA | Requs AI](https://missionreadysoftware.com/standards/SAE-ARP-5580-Software-FMECA.html): Discover why SAE ARP5580 Software FMECA is an outdated approach and how the 6D CDE Software FMEA provides a superior, modern alternative for defect prediction.
- [Software Reliability & Software FMEA Standards | Requs AI](https://missionreadysoftware.com/standards/software-reliability-standards.html): Explore Requs AI's index of software reliability and FMEA standards, summarizing each document's guidance on software, including software safety and FMECA.

## Training
- [Certified Reliability Engineer — Software | Requs AI](https://missionreadysoftware.com/training/certified-reliability-engineer.html): Master software reliability engineering, FMEA, and defect prediction. Earn your Certified Reliability Engineer — Software credential via exams & training.
- [Design & Test for Hidden Edge Cases — Training | Requs AI](https://missionreadysoftware.com/training/design-test-hidden-edge-cases-training.html): Master edge case design & testing with Requs AI's expert training. Developed by the global leader in software failure mode analysis & reliability engineering.
- [Identify Software Program Risks Early — Training | Requs AI](https://missionreadysoftware.com/training/identify-software-program-risks-training.html): Prevent costly software failures. Requs AI training helps you identify program risks, gain critical skills in reliability & defect prediction.
- [Identify Wasteful Development Practices — Training | Requs AI](https://missionreadysoftware.com/training/identify-wasteful-practices-training.html): Identify wasteful software development practices with Requs AI's training; optimize ROI by learning to distinguish high-value efforts from low-return work.
- [Software Reliability Training Courses | Requs AI](https://missionreadysoftware.com/training/index.html): Software reliability training courses: predict software defects, failure rate and availability, software FMEA, fault tree analysis and edge case design per IEEE 1633.
- [Most Common Edge Cases — Training | Requs AI](https://missionreadysoftware.com/training/most-common-edge-cases-training.html): Discover Requs AI's training on common, overlooked software edge cases for defect prediction, software FMEA, and reliability engineering.
- [Navigating the IEEE 1633 and SAE 1025 FMEA | Requs AI](https://missionreadysoftware.com/training/navigating-ieee-1633-sae-1025-fmea-training.html): Requs AI training maps its software reliability engineering classes to IEEE 1633, SAE 1025 FMEA, and our product suite to help you find the right course.
- [Predict Software Defects — Training | Requs AI](https://missionreadysoftware.com/training/predict-software-defects-training.html): Discover Requs AI's software defect prediction training, led by the IEEE 1633 chair, to learn data-driven reliability methods before writing any code.
- [Predict Software Failure Rate, Availability & Reliability — Training](https://missionreadysoftware.com/training/predict-software-failure-rate-availability-training.html): Requs AI's training helps you predict software failure rate, availability, and reliability using cutting-edge models from the IEEE 1633 chair.
- [Software Fault Tree Analysis — Training | Requs AI](https://missionreadysoftware.com/training/software-fault-tree-analysis-training.html): Master software fault tree analysis with expert training guided by the Common Defect Enumeration: analyze failure modes and predict software defects accurately.
- [Software FMEA Training | Requs AI](https://missionreadysoftware.com/training/software-fmea-training.html): Master effective software FMEA with expert-led training. Move beyond checklists to real-world application, identifying common defects & system hazards.
- [Software Reliability Growth Models — Training | Requs AI](https://missionreadysoftware.com/training/software-reliability-growth-models-training.html): Master software reliability growth models with Requs AI training, forecasting defects from failure data to make confident release decisions.
- [System Availability Objectives & Error Budgets — Training](https://missionreadysoftware.com/training/system-availability-error-budgets-training.html): Master system availability & error budgets with Requs AI training. Predict software/hardware reliability for a full system view. Get precise insights.