Reliability Design and Analysis Software PosVim. It is a platform for functions, performance, reliability, maintainability, supportability, testability, safety, environmental adaptability integrated design and analysis. The platform includes four sub-platforms, including design and analysis sub-platform, simulation sub-platform, test and verification sub-platform, and data mining application sub-platform. Among them, design and analysis sub-platform includes reliability prediction, reliability modeling, failure mode affect and critical analysis FMECA, FTA, fatigue life analysis, failure physics POF analysis and other functional modules; simulation sub-platform includes multi-physical environment simulation, reliability simulation, supportability simulation; test and verification sub-platform, including accelerated life test design, accelerated degradation test design, test sample optimization design, small sample test design, Bayesian test validation design, component test design, reliability test design of complex systems and complex networks; Data mining application sub-platform, including warrant prediction analysis, Weibull analysis,etc.
Main Function：
1、Design and Analysis Subplatform
Design and analysis sub-platform is mainly used for enterprises to predict, allocate, model, analyze and simulate the reliability, maintainability, supportability, testability and environmental adaptability of products in the demonstration and design stages of products and equipment, and to guide designers to carry out the corresponding design and analysis work quickly and efficiently. In order to find out the weaknesses of the system as soon as possible and improve the reliability of the products.。
a、Reliability Prediction Module
Key Features：
（1）Supporting stress/counting/reliability prediction method based on fault physics;
（2）Support Reliability Prediction of Components, Components and Systems at Different Levels；
（3）Support GJB/Z 299C, GJB/Z 108A, MIL-HDBK-217F, Telcordia SR332, Siemens SN29500, 217Plus, IEC TR 62380, NSWC and other electronic and mechanical product reliability prediction standards
（4）Supporting the reliability prediction method of comprehensive test and field data；
（5）Including abundant reliability prediction parameters and models data for electronic and mechanical components；
（6） Output reliability prediction summary table, comparative analysis table of different design schemes, key/pivotal components list, components reliablity report, failure rate and temperature curve, quality guarantee period failure prediction result, reliability prediction report, etc., report can be customized.
（7）Reliability prediction for supporting working and non-working conditions
（8）Trade-off analysis between supporting reliability design scheme and cost
（9）Optimal Analysis of Supporting Reliability Index and Device Selection
Key Features：
（1）Support the models of series, parallel, standby, voting and power.
（2） It supports the reliability modeling of repairable systems, multi-functional units, multi-task phases and other tasks model. It can calculate the reliability of system mission such as reliability, availability, MTBF and MTBCF by analytical or simulation methods.
Key Features：
Provide reliability allocation methods such as score allocation method, ARINC allocation method, AGREE allocation method, equal allocation method, minimum workload method, reliability allocation method with confidence degree, etc.。
Support the allocation of MTBF, reliability, availability and other indicators。
Support to Adjust the reliability allocation value。
Failure mode affect and critical analysis(FMECA) module is an important and basic item for reliability work. Through FMECA analysis, potential failure modes of products are found, key product lists are determined, control plans are drawn up and effective compensation measures are taken to improve design and achieve reliability growth.。
Key Features：
（1）Supporting Fast FMECA and Detailed FMECA；
（2）Support function/hardware FMECA, process/process FMECA, software FMEA；
（3）Supports FMECA standards such as GJB1391, SAE J1739, and can customize FMECA analysis standards.；
（4）Support Function Block Diagram/Block Diagram Modeling and Graphical Fault Mode Transfer Relation Modeling；
（5）Supporting the control of failure modes and the supervision of implementation status, we can make control plans for key failure modes and verify the effectiveness of implementation; Supporting the simulation analysis of fault propagation path, visualizing the assistant designers to analyze and confirm the failure, and guiding the design improvement.；
（6）Contains a wealth of common failure mode libraries for electronic and mechanical products；
（7）
Output list of key failure modes, list of type I and II failure modes and qualitative and quantitative analysis report。
Fault tree analysis module is based on the key fault mode as the top event to analyze its occurrence probability and causes, so as to take effective preventive measures to control the occurrence of faults.
Key Features：
（1）Fast Fault Tree Diagram Establishment and Fault Tree Graphic Output Function；
（2）Supporting more than 10 Boolean logic models such as AND-Gate, OR-Gate, XOR-Gate, etc.；
（3）Supporting more than 10 types of events, such as basic events, housing events, etc.；
（4）Supporting six Method for Calculating the Occurrence Probability of basic Events；
（5）Supporting common-cause failure modeling and analysis, supporting Alpha and MGL methods, supporting common-cause mode events with different color markers, and comparative analysis of common-cause mode and non-common-cause mode faults.；
（6）Supporting the Folding Function of Fault Tree Graphics；
（7）Supporting fault tree checking functions, including basic event checking, independence checking, data integrity checking；
（8）Supporting cut set filtering and multi-view graph analysis to quickly and accurately identify vulnerabilities；
（9）It can solve the minimum cut set, calculate the probability of top event occurrence, calculate the probability importance, structure importance and critical importance, and support dynamic fault tree analysis.。
i、Derating Analysis
Derating is to realize that the stress of components in use is lower than its rated value, in order to delay the degradation of its parameters and improve the reliability of use. It is usually expressed in terms of stress ratio and ambient temperature. Generally, according to the characteristics and requirements of products, different levels of derating standards can be formulated. For example, GJB/Z35 is divided into three levels: I, II and III. Attention should be paid when using: Although the derating can effectively improve the reliability of components, the components have an optimal derating range. Within this range, the decrease of the working stress of components can significantly improve the decrease of the failure rate. If the derating is carried out beyond the optimal derating range, the effect of improving the reliability of components will be reduced. Therefore, the derating can improve the reliability of components, but the scope of attention and trade-offs need to be considered.！
Key Features：
Supports GJBZ35 and NAVSEA, MIL-STD-975M (NASA), MIL-STD-1547, Naval Air System Command AS-4613 and ECSS-Q-30-11-A design standards, and can customize the quota reduction criteria.
Supporting compliance checks and statistical analysis
Integration of reliability prediction and automatic acquisition of predicted data
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2、Simulation sub platform
The simulation sub-platform, which combines the reliability, safety and testability of the product with the input of the digital prototype model, builds the thermal, vibration and fatigue environment models respectively, and simulates and analyses the failure physics (including thermal, vibration, fatigue, electromagnetic, etc.) of the product, including failure physical simulation. Fatigue simulation analysis, crack and life analysis, circuit tolerance simulation analysis (based on circuit SPICE model), fault diagnosis and so on. This sub-platform simulates and solves the deep and fundamental problems caused by product failure from the point of view of product failure physics.
3、Test Design and Analysis Subplatform
It includes reliability test design, accelerated life test design and analysis, accelerated degradation test design and analysis, reliability assessment and other modules.
a、Design and Analysis of Accelerated Life Test
（1）It has the functions of making accelerated life test plan, designing accelerated life test scheme, collecting accelerated life test data and analyzing accelerated life test data.
（2）Supporting 10 kinds of distribution fitting and parameter estimation, such as exponential, Weibull, lognormal, normal and gamma distribution, can give the estimation value and the result of parameter correlation calculation.
（3）It supports data processing and parameter estimation of more than 10 commonly used acceleration models, such as Arenius, Ailin and inverse power rate. Data processing supports scatter plot, outlier test, distribution test, distribution fitting, accelerated parameter calculation and life calculation.
（4）Data Processing and Life Analysis of Tests Supporting Single Stress, Double Stress and Multi-Stress。
（5）Data Processing and Analysis of Test Supporting Least Square Method and Maximum Likelihood Method。
（6）Provide product acceleration model and test data method under the action of temperature, humidity, current, voltage, power, temperature difference, vibration and frequency of use to improve the convenience of use.。
（7）The point and interval estimates of MTBF/life can be calculated, and the results of stress-life and residual analysis can be given.。
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b、Design and Analysis of Accelerated Degradation Test
（1）It has a series of process test management functions, such as test plan, scheme design, scheme optimization and evaluation, data acquisition and processing, model checking, life analysis, etc.。
（2）Supporting 10 kinds of distribution fitting and parameter estimation, such as index, Weibull, lognormal, normal and gamma distribution, can give the estimation value and the result of parameter correlation calculation.。
（3）It supports data processing and parameter estimation of more than 10 commonly used acceleration models, such as Arenius, Ailin and inverse power rate. Data processing supports scatter plot, outlier test, pseudo-life calculation, distribution test, distribution fitting, accelerated parameter calculation and life calculation.
（4）Data Processing and Life Analysis of Tests Supporting Single Stress, Double Stress and Multi-Stress
（5）The experimental data processing and analysis are supported by least square method and maximum likelihood method.
（6）Provide product acceleration model and test data method under the action of temperature, humidity, current, voltage, power, temperature difference, vibration, frequency and other stresses to improve the convenience of use.
（7）The point and interval estimates of MTBF/life can be calculated, and the results of stress-life and residual analysis can be given.
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