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What is Deos?

Deosâ„¢, created by DDC-I, is a real-time operating system (RTOS) focused on safety and rigorously verified in alignment with DO-178C/ED-12C Design Assurance Level A (DAL A) standards for avionics use. This RTOS is compatible with ARINC 653 APEX and employs rate monotonic scheduling (RMS), specifically engineered to fulfill the FACE Safety Base Profile requirements. Since receiving its initial verification from Transport Canada in 1998, Deos has established itself as a reliable solution within the aviation sector, earning certification that permits its operation in countless aircraft. Over the last twenty years, it has continually adapted, integrating new processors and features to showcase its versatility and robustness. Additionally, Deos has successfully passed audits from numerous global certification bodies such as the FAA, ENAC, JAA, EASA, and CAAC, along with assessments by designated engineering representatives from various avionics and airframe manufacturers, guaranteeing that it remains in compliance with the highest industry standards. This ongoing commitment to development and verification not only reinforces its reliability but also positions Deos as an essential element in the landscape of modern aviation safety systems. Furthermore, its ability to evolve alongside technological advancements ensures that it remains at the forefront of safety-critical software solutions.

What is Astah System Safety?

Astah System Safety is a robust platform tailored for model-based safety evaluations in critical environments, developed by Change Vision, Inc. This cutting-edge software merges SysML modeling with STAMP/STPA hazard evaluations, GSN (Goal Structuring Notation) assurance cases, ASAM SCDL, and UAF, all within a unified interface. By establishing a direct connection between safety assessments and the system model, it guarantees that control structures, hazards, and safety arguments can be traced back to both the requirements and the overall system architecture. This tool is especially beneficial for safety engineers engaged in industries such as automotive, aerospace, and embedded systems, aiding in the development of safety cases that adhere to standards like ISO 26262. Furthermore, the AI Chat Copilot feature employs your own API key to access various services, including OpenAI and Azure OpenAI, while also linking to a local MCP server to facilitate the integration of external AI agents with your models. Users can conveniently share models using XMI format and collaborate more effectively with Cameo Systems Modeler. Astah System Safety is compatible with both Windows and macOS, although it does not support Fault Tree Analysis (FTA) or Failure Mode and Effects Analysis (FMEA). A complimentary trial period of 40 days is provided, allowing prospective users to evaluate its features before making a purchase. In conclusion, this tool signifies a notable leap forward in the quest to ensure the safety of intricate systems, making it an essential resource for professionals in the field.

Media

Media

Integrations Supported

LDRA Tool Suite
Rapita Verification Suite
eXtremeDB

Integrations Supported

Cameo Systems Modeler
Microsoft Excel
OpenAI

API Availability

API Availability

Has API

Pricing Information

Pricing not provided

Pricing Information

$550 per year
Annual license: $550 per user per year. Annual floating license: $1,050 per seat per year, with a self-hosted license server required. Per-seat floating prices decrease with larger packs (for example, $9,500 for 10 seats). Monthly licenses are not available.

For universities, the Faculty Site License ($900) covers Astah System Safety, Astah SysML, and Astah Professional for all faculty and students in a department.

A 40-day free trial is available. AI features (AI Chat Copilot and the local MCP server) require your own API key from a supported AI service, and API usage is billed separately by that provider.
Free Trial Offered?

Supported Platforms

SaaS
Windows
Linux

Supported Platforms

Windows
Mac
On-Prem

Customer Service / Support

Standard Support
Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub
Webinars
On-Site Training

Training Options

Documentation Hub

Company Facts

Organization Name

DDC-I

Date Founded

1998

Company Location

Canada

Company Website

www.ddci.com/products_deos_do_178c_arinc_653/

Company Facts

Organization Name

Change Vision, Inc.

Date Founded

2006

Company Location

Tokyo, Japan

Company Website

astah.net/products/astah-system-safety/

Categories and Features

Categories and Features

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