Defense Industry
Defense Systems: Reliability, System Safety, and Life-Cycle Cost on a Sustained Platform
Defense systems are sustained for decades across land, naval, missile, and command-control programmes that no other industry runs on similar timescales. TMG delivers Fault Tree Analysis, System Safety Analysis, Life Cycle Cost modelling, and the Isograph reliability portfolio that anchors MIL-STD-grade reliability engineering for defence primes, tier-one suppliers, and government acquisition authorities operating under MIL-STD, ITAR, AQAP, NATO STANAGs, and the Australian Defence Industry Security Programme.
Built for the standards your acquisition authority and your customer demand
The methodology and documentation we deliver is configured against the working set of MIL-STD, NATO, ITAR, and Australian defence standards that govern reliability, system safety, and sustainment economics across modern defence systems.
The challenges we address
Programmes are sustained for decades but planned in five-year increments
Defence platforms routinely run for thirty to fifty years from initial deployment to retirement. Sustainment planning that operates in five-year acquisition increments without an underlying life-cycle cost framework produces obsolescence surprises, capability gaps, and budget shocks at every cycle.
Reliability evidence has to survive multiple audits across multiple authorities
The same reliability data set has to satisfy the platform prime, the acquisition authority, the operating service, the regulator, and the export-control regime. Without a structured tooling environment, the evidence drifts across versions and audiences, and the corrections compound across the programme.
System safety runs disconnected from reliability and from operations
MIL-STD-882 system safety analysis, MIL-HDBK-217 reliability prediction, and the operational sustainment data each live in different tools, owned by different teams, on different review cycles. The integration the engineering discipline requires happens, when it happens, through reformatting.
Sustainment economics are opaque to the programme office
Cost of ownership over a defence platform's service life dwarfs the acquisition cost. Without a structured Life Cycle Cost model that connects reliability, maintenance, spare-parts provisioning, and obsolescence management, the sustainment-budget conversation is conducted on the basis of last year's line item rather than projected lifecycle economics.
An integrated reliability and sustainment programme, not a documentation deliverable
TMG configures, integrates, and operationalises the Isograph reliability portfolio for defence systems engineering, sustainment, and life-cycle cost analysis. The deliverable is a working analytical capability that the engineering team uses rather than a one-time submission package.
Reliability prediction against the full handbook library
TMG operates the Isograph Reliability Prediction module against MIL-HDBK-217, Quanterion 217Plus, FIDES, Telcordia, IEC 61709, IEC TR 62380, GJB 299C, and NSWC handbook libraries. Component-level rate predictions feed the system-level reliability model, the FMECA, and the broader RAM analysis on a consistent data model.
Fault Tree Analysis and System Safety Analysis on the Reliability Workbench
FTA quantifies the failure combinations that produce a defined hazardous event; System Safety Analysis applies the MIL-STD-882 framework to hazard tracking, mitigation, and verification across the platform lifecycle. The two methods share component data and integrate within the Reliability Workbench, so the safety case and the reliability case live on the same data model.
Life Cycle Cost modelling for defence platforms
The Isograph Life Cycle Cost module connects reliability, maintenance, spare-parts provisioning, obsolescence management, and operating cost into a single sustainment-economics model. The programme office sees the lifecycle cost projection in a form that drives acquisition, sustainment, and capability decisions rather than retrospectively explaining them.
Attack Tree Analysis for system-level threat modelling
Defence systems carry cybersecurity exposure across the platform, the supply chain, and the supporting infrastructure. The Isograph Attack Tree Analysis platform applies the same structured threat-modelling discipline TMG uses in industrial cybersecurity, mapped to MIL-STD-882 hazard categories and the broader threat-and-resilience portfolio.
Sparing analysis, obsolescence management, and sustainment planning
Defence sustainment economics are driven by the spare-parts holding decision, the obsolescence-management programme, and the maintenance regime. TMG integrates the reliability picture with the spare-holding optimisation, the diminishing-manufacturing-sources analysis, and the multi-year sustainment plan that the acquisition authority needs to see.
What defence programmes have realised
The descriptors below characterise the typical outputs of a TMG defense engagement. Depth in any given engagement scales with the size of the operation, the maturity of the existing reliability and quality programme, and the regulatory exposure of the operator.
Engage TMG for your Defense programme
The Mantua Group delivers reliability prediction, system safety analysis, life-cycle cost modelling, and sustainment economics for defence systems operating under MIL-STD, ITAR, AQAP, NATO STANAGs, and the Australian Defence Industry Security Programme. We bring the analytical rigour, the standards familiarity, and the implementation discipline that turns a reliability model into a defensible sustainment case across the programme lifecycle.