Reliability & Mission Assurance

ARES is a recognized leader in the use of quantitative tools to assess the reliability and mission readiness of nuclear, space, and defense systems.  In these high-risk environments, ARES’ ability to perform iterative quantitative assessments provides clients with objective data to support complex decisions.

Our focus on quantitative risk management differentiates our reliability and mission assurance services.  ARES’ knowledge of risk methodologies is extensive, spanning probabilistic analysis, deterministic analysis, fault tree analysis (including system/subsystem failure analysis and the ability to perform risk-based trade studies), root cause analysis, uncertainty analysis, Monte Carlo simulation, parametric analysis, event tree analysis, failure modes and effects analysis, reliability analysis, process hazard analysis, consequence analysis, and decision analysis.  ARES’ personnel possess deep expertise in modeling complex systems to identify risks or vulnerabilities and predict performance, and are often engaged to design holistic risk management systems on complex projects.  In particular, ARES has unique, industry-leading expertise in probabilistic risk assessments (PRAs), performing some of the world’s most complex PRAs on behalf of NASA and the DoD.  ARES has performed PRAs for the complex technological systems aboard the International Space Station and for fighter and bomber aircraft.

ARES is a leader in mission assurance and offers a full complement of tools and processes developed from significant experience with NASA and the DoD.  The Company’s mission assurance services span three areas outlined below.

Quality Assurance

ARES provides a range of quality assurance services for clients:

  • Support for development and foundation of a compliant and effective AS9100 system of processes, measurements, and policies;
  • Facilitation and active leadership of effective and ongoing auditing, continuous improvement, and change management; and
  • Lessons learned and knowledge management practices that ensure processes are optimized.

Systems Safety

ARES leverages our extensive risk management capabilities, spanning fault tree analysis (including system/subsystem failure analysis), root cause analysis, event tree analysis, failure modes and effects analysis, reliability analysis, process hazard analysis, consequence analysis, and decision analysis to evaluate failure information from a system’s components in order to develop probability distributions that the system will be able to perform safely.  ARES can model complex systems to identify risks or vulnerabilities and predict performance.

We combine our quantitative methods with in-depth knowledge of hazards present within complex nuclear, space, and defense systems.  We have significant experience with hazards ranging from non-nuclear hazards (e.g., chemicals, high explosives) to the highest level of nuclear hazards (e.g., nuclear explosives and weapons).  ARES’ personnel have extensive experience in efficiently and cost-effectively developing DOE Documented Safety Analyses (DSAs) to comply with 10 CFR 830 and NRC Safety Analysis Reports (SARs) for initial operation, updating DSAs to meet current criteria and requirements, and preparing un-reviewed safety question analyses and documentation.  In performing these tasks, ARES uses our full suite of safety analysis and risk assessment services, ranging from qualitative assessments to detailed quantitative analyses.  As needed, ARES leverages our engineering competency to provide specialized support, such as seismic and electrical, and documentation support in the form of system design descriptions.


ARES provides specialized expertise (e.g., risk based asset management, deferred maintenance buydown, optimized facility management projections) and proprietary tools to enable its clients to better allocate limited capital funds to reduce the risk of critical nuclear facilities being unavailable and to more efficiently handle their maintainability.  ARES’ capabilities cover the entire gamut of clients’ facility management assessment, management, and planning needs.  With extensive understanding and experience with government and industry requirements, a risk-based approach for decision making and validation, and computerized models for standardization, simplification, and alternative evaluation, ARES is the premier provider of risk-based maintainability solutions.

ARES’ risk-based reliability and mission assurance services are unique in that a holistic methodology involving experienced personnel, proven processes, and innovative risk assessment tools is deployed to help its clients accomplish their mission objectives.  The ability to understand, in a risk-ranked manner, how capital should be most effectively deployed to increase system reliability is a major benefit of our risk-based approach.