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SAM - Systems Analysis Modeller

In anticipation of the adoption of the SRtP regulations, in 2009, Brookes Bell Safety at Sea Ltd started the development of a software tool to carry out analysis of residual systems availability after flooding or fire damage. The software has been developed in-house and in collaboration with major ship yards and design offices.

The software can be used during the basic design stages, when the systems concepts and principles have been defined.

Comprehensive Verification | The Process | Application Features

Systems Analysis Modeller

Comprehensive verification

SAM provides the ability to comprehensively validate the redundancy of complex systems to any type of scenario, including loss of multiple compartments.

Understanding of critical failures

The outcome of the analysis carried out with SAM includes information on the impact of failures on active components, subsystems and auxiliaries, including power generation and supply. It also provides options for recovering the systems, including manual actions by the crew. The system can greatly enhance the Failure Mode and Effect Analysis (FMEA) process.

Time efficiency

Operability of systems can be achieved by systems segregation, redundancy and/or active recovery of affected components and sub-systems. The SAM environment allows the designer to assess systems design alternatives in a time-efficient manner; facilitating the identification of optimal ship systems concepts and arrangements: i.e. in line with statutory provisions and consistent with operational practice.

Documentation Facility

The outcome of the analysis is reported automatically and can be customised to facilitate design iterations or final verification. The results can be presented and analysed (i) system by system, (ii) by location and (iii) by type of damage. The level of detail of the results is suitable for use in FMEA studies.

Life-cycle utility

The SAM model developed during the design process can be used to assess and monitor compliance throughout the lifecycle: during planned maintenance, during upgrades and conversion, etc.

Crew-Operating manuals

Once an SAM model is available, the analysis can be easily expanded to assess systems operability and vulnerability in more representative casualty scenarios. This can greatly assist in the development of crew operating manuals, emergency contingency planning and crew training.

The Process

  • Import ship watertight subdivision and fire compartmentation
  • Modelling of systems: dedicated interactive GUI used to create system model from systems’ concept drawings, single line diagrams or systems’ topological diagrams. Level of detail can be adjusted to stage of design. Cabling and piping can be imported from tabular data. Operability criteria are user-defined.
  • Automatic definition of casualty scenarios (damages) with ability to modify manually and define custom damages.
  • Use of Binary Decision Diagrams (BDD) to establish impact of casualty scenarios and damages on modelled systems components, sub-systems, systems and ultimately on defined operability criteria.

Application Features

Powerful GUI

The working environment integrates watertight subdivision, arrangement of fire compartmentation and systems topological diagrams.

Multi-User Database

The program incorporates an SQL database which allows for multiple users working on the same project and detailed tracking of changes.


Assessment of both physical damage and impact on system functionality/operability can be performed.

Automatic Reports

Automatic generation of reports and documentation for design iterations, FMEA verification or statuatory approval.

Flexible, Powerful Modelling

The level of detail can be adjusted to the stage of design with the operability criteria being user-definable.

DXF Importing

The facility to import and update watertight subdivision and A-class boundaries from DXF drawings.