CARE® Reliability Software

CARE® comprises an integrated set of software tools, offering engineers a complete solution for all RAMS (Reliability, Maintainability,Availability and Safety) aspects of a product. CARE analyzes various components failures and their impact on system operational behavior and safety, while taking into account redundancy and backup elements. Unlike other tools, CARE provides all reliability analysis in one integrated platform – including traditional Mil-Std, ISO 9000, EN and IEC standards methods and advanced RAMS & ILS analysis techniques. The use of BQR CARE improves and enhances product reliability and robustness.

Features & Benefits

  • Complies with the most stringent standards
  • Provides MTBF estimations during design
  • Reduces RAMS analysis time
  • Easy to master and operate
  • Used in the full-scale development as a bottom-up prediction/analysis
  • Recommends optimal redundancy for high-availability systems



  • RBD-Basic
  • RBD-Markov
  • RBD-Network
  • RBD-IEC-61508
  • FTA
  • Testability Analysis
  • MTTR
  • Mechanical Reliability Simulation

Please contact us and state the package that suits your needs.


About CARE Reliability Software

CARE consists of several key modules that can be integrated using a core database to provide complete RAMS analysis for reliability and safety. Unlike other reliability tools, CARE modules can operate individually or integrally, according to client preferences.

Five steps for Safe and Reliable product design

Step 1: MTBF

fiXtress – MTBF calculates the Mean Time Between Failures of the components and assemblies up to system level, by using a product tree. The MTBF can be calculated for electronic and mechanical equipment. It is calculated using a serial model (without taking into account redundancy and backup elements), which is the worst case scenario, since any component’s failure will result in system failure.

Step 2: Safety Analysis

Once the MTBF has been calculated, the same product tree can be utilized for CARE – FMEA / FMECA. FMECA helps classify all possible failure modes for components or functions according to severity and criticality, using a bottom up approach.
Next, Fault Tree Analysis (FTA) can be conducted in order to calculate occurrence probabilities of safety events. CARE – FTA uses the failure modes which were already defined during the FMECA.

Step 3: Testability Analysis

The CARE – Testability Analysis module analyzes the ability of the internal Built-In-Test (BIT) circuits to detect and isolate the failure modes which were defined during FMECA. The result is an efficient BIT policy that ensures high fault coverage and quick failure isolation.

Step 4: Reliability Block Diagram

The next step is defining the product redundancy structure in order to evaluate the Reliability, Availability and Mean Time Between Critical Failures (MTBCF) of the product. CARE – RBD shows the success path, which indicates the assemblies required for the product to function.
CARE – RBD includes optional advanced modules for RBD Networks (used in the Telecom, Oil & Gas, and Utility industries) and Markov chain calculations (used mainly for systems with load sharing and/or state transition delays).

Step 5: Maintainability

Once the product is reliable and safe, maintenance analysis can proceed  using the CARE – MTTR. The MTTR is the average “Remove and Replace time” of all the faulty assemblies. Complete maintenance analysis which accounts for logistic delay times is later done using BQR’s apmOptimizer.

Finally, an an Initial Maintenance Concept will be optimized by apmOptimizer.