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TRACEIT


TRACEIT
Overview 
An STPA tool focused on traceability (Released Jan. 28, 2026)
  • TRACEIT is a tool that constructs a computerized control-structure by defining the generation and transmission of signals between system components, instead of relying on a purely visual control-structure.
  • Based on the computerized control-structure, TRACEIT offers a variety of trace functions during the overall STPA process. This is especially useful for analyzing complex control systems where multiple control loops are overlapped (The same components and signals are duplicated in different control loops).
TRACEIT control structure diagram of a vehicle access control barrier system, showing administrator, interphone, vehicle driver, recognition panel and camera, computer, traffic controller and barrier actuator with numbered feedback signals
TRACEIT
Key Features 
Support for STPA steps 1-4:

Supports the full range of steps in STPA: defining losses & hazards, constructing the control structure, conducting UCA analysis, and drafting loss scenarios.

Computerized Control-Structure:

Instead of using a visual diagram, TRACEIT models signal interconnections among system components in data form.

Control-Structure Completeness Checking:

It checks the completeness and consistency of the control structure, using standard inspection rules (e.g. verifying that generated signals are referenced in process models).

Automated Fault Impact Assessment:

Simulates fault impact analysis by assuming unavailability of individual or multiple system components (entities or connections), or by manipulating shared property values (e.g. platform, location).

Comprehensive Trace Information Throughtout the STPA Process:

Throughout the STPA process, TRACEIT provides various trace views (highlighting, abstract views, etc.) to support model review, confirmation, and UCA cause analysis.

Flexible Model Editing and Expansion:

Supports incremental modification, supplementation, and extension of existing computalized control-structure data without needing to rewrite the structure from scratch.

Management of Causes & Countermeasures:

For each loss scenario (Cause – UCA – Hazard – Loss), TRACEIT helps users develop, organize, and manage associated causes and countermeasures.

Trace View of Analysis Results:

Enables trace-based display of the entire analysis and specific items according to user settings, facilitating review, communication, and system improvement.

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TRACEIT


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