Testability
Solutions
Discover our Testability offer
Spherea provides end-to-end support for the design and implementation of optimised testing strategies, tailored to meet the specific needs of your programmes.
Our specialists can work alongside your internal teams or offer external expertise to ensure high levels of system availability and operational efficiency.
In addition to its engineering services, Spherea is an authorised distributor of DSI International’s ISDD Tool Suite – a powerful collection of software tools designed to enhance system diagnostics, testability analysis, and in-service support capabilities.

Our Expertise:
- Validation availability levels (detection rate, fault location rate) using eXpress and RAMS team support
- Conducting testability studies for system component suppliers
- Defining support policies, including fault tree analysis and maintenance procedure design
- Drafting specifications for optimised support systems to maintain operational readiness
- Training and Tool Support
- Assistance with tool deployment
- French-language training for internal users
- Ongoing support for best practices in engineering and testability
Discover the ISDD Tool Suite

eXpress
System modelling for design and diagnostics analysis.
eXpress provides an environment for the design, input, integration, assessment and optimisation of system diagnostics as well as Prognostic Health Management (PHM), system testability studies, failure modes and effects analysis and analysis of system dependability.STAGE – Simulation diagnostics
STAGE simulates diagnostics aspects, PHM and Integrated System Health Monitoring (ISHM), illustrating the system support capacities during its service life. Various types of analysis may be performed using STAGE, including testability, system reliability and mission success rate, supportability and logistics resource allocation.
RTAT – Diagnostics Publishing and Integration
The Run-Time Authoring Tool (RTAT) allows seamless publishing of diagnostics data from eXpress. It supports integration into operational environments, enabling the design of diagnostics and prognostics capabilities for real-time system support.
DSI Workbench – Operational Troubleshooting
DSI Workbench deploys diagnostics in production and maintenance environments. It integrates engineering views, diagnostics design, and multimedia elements (photos, videos) to streamline troubleshooting and maintenance operations.