Digital and Model-Based Engineering
Models, mission engineering, MBSE, simulation, and virtual integration expose problems before physical integration and connect decisions to evidence.
How We Work
Methods connect the disciplines to the mission system.
ExistX applies a connected set of engineering approaches across four disciplines to reduce integration, assurance, lifecycle, and transition risk. Methods are how ExistX works. They are not additional capability disciplines, and they are not evidence.
Starting point
The research starting point and the operationalization role
Every ExistX engagement starts from the same premise: advanced applied research may already exist for the hardest part of the problem. The methods on this page are how that starting point becomes, and remains, an operational capability.
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Galois-to-ExistX Research Pipeline
Galois provides research; ExistX operationalizes. Two separate organizations, one governed pipeline: the structural reason ExistX never starts at zero.
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Research Operationalization
The lifecycle approach that connects an approved technical baseline to mission fit, architecture, implementation, verification, deployment, and sustainment.
Methods with detail pages
Engineering methods, in depth
Three methods currently carry enough public content for their own pages. Each states its approach, boundaries, and evidence path.
Modular Open Systems Approach
Stable boundaries, replaceable components, defined interfaces, standards, conformance evidence, and appropriate technical-data and IP planning.
Risk-Based Technical Assurance
Formal verification, program analysis, automated verification and validation, test, independent review, and certification support selected proportionately to the property, mission consequence, boundary, and residual uncertainty.
Methods described here
Further methods in the same system
These approaches are part of how ExistX works today. They stay described here until their content depth and approved examples justify dedicated pages. A method page is earned by substance, not by structure.
Early Integration and Experimentation
Components and technologies integrated before full-system test through prototypes, hardware- and software-in-the-loop environments, incremental demonstrations, and explicit readiness decisions.
Automated Test and Verification
Repeatable evidence generation automated while distinguishing test, analysis, proof, validation, and operational evaluation.
Interoperability Engineering
Contracts, data models, interfaces, standards, and conformance boundaries defined across components and systems.
Sustainment by Design
Upgradeability, obsolescence, technical-data access, source-code and software rights, maintenance flexibility, configuration, provenance, and product support addressed early.
Method × discipline
Every method spans all four disciplines
Methods are cross-cutting by design: risk-based assurance applies to cryptographic implementations as much as to system integration; MOSA boundaries shape software and systems alike. The discipline pages show each method in its technical context.
- Cryptographic EngineeringConnects algorithm and key-management decisions to implementation, assurance, agility, embedded constraints, and lifecycle transition.
- Cybersecurity EngineeringIntegrates threat, architecture, software, components, evidence, and lifecycle decisions within a defined system boundary.
- Software Engineering & ModernizationMission-software and lifecycle engineering: architecture, modernization, DevSecOps, automated testing, assurance, migration, and incremental delivery.
- Systems Engineering & IntegrationConnects mission needs to architecture, embedded systems, interfaces, digital models, hardware-software integration, test, and lifecycle decisions.
Next step
Start where ExistX starts: the research pipeline
The pipeline explains the relationship that makes operationalization credible: where the research comes from, who owns what, and where ExistX's engineering responsibility begins.
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