The Company: T&T Systems Srl

T&T Systems Srl is a company specialised in the design and utilization of tools, methods and engineering and I.T. technologies in the field of industrial automation.

T&T Systems also provides services related to the development and certification of critical systems for the purpose of human safety.


The methods used by T&T Systems cooperates with its clients include:

  • "Turnkey" projects or consultancies execution at our premises;
  • A team of highly specialised consultants to be integrated with the Customer's teams at their premises.

T&T Systems has worked with large Industries, both Nationally and Internationally among which: former Landis & Gyr, Siemens (PTD and I&S Divisions), ABB, Alstom, ENEL, Magrini Galileo, Carlo Gavazzi, Cimabli, Elsag, RFI and more.



HINTSW is the section of the T&T Systems with a special vocation and a very specific mission: the functional safety of programmable electronic systems used in critical applications for human safety.

The story begins with HINTSW participation in major development projects of High Integrity Software from which it takes its name, and then spread, slowly, slowly, in all aspects of complex systems in automation and control and all stages of safety-critical systems' s life cycle.

HINTSW, as well as the skills closely related to functional safety, also acquired engineering knowledge necessary to perform the calculations of reliability and availability (usually in accordance with IEC 61703) of complex systems which can be, for instance BPCS (Basic Process Control System) of a chemical plant, or the main SIS (Safety Instrumented Systems) of an oil & gas facility.


Currently HINTSW is able to support customers in all planned activities in systems and software life cycle including:


  • Definition and planning of RAMS (Reliability, Availability, Maintainability and Safety) life cycle of a system.
  • System and Software Safety life cycle definition and planning.
  • System safety plan definition.
  • Definition of verification and validation plans of system and software with relevant procedures..
  • Preliminary risk analysis.
  • HAZOP studies (HAZard and OPerability analysis).
  • Hazards identification and risk analysis.
  • RAM analysis (Reliability, Availability, Maintainability) in complex systems, including calculations in accordance with IEC 61703.
  • Fault Tree Analysis, Event Tree and Markov Analysis, FMEA (Failure Mode and Effect Analysis) and FMECA (Failure Mode, Effects and Criticality Analysis), Reliability Block Diagrams, Reliability and Maintainability Prediction.
  • Calculation of system failure probability / system safety integrity.
  • Definition of safety case and hazard log.
  • Definition of the system and software safety requirements specifications.
  • Definition of validation and verification (V&V) plans.
  • Definition of test procedures and test cases.
  • Allocation of safety requirements.
  • SIS (Safety Instrumented System) engineering and design.
  • Implementation of safety-related and application software.
  • Hardware and software testing execution.
  • Software translators (compilers) and application software validation.
  • Execution of all verification and validation (V&V) activities included in the life cycle.
  • Safety assessment activities as an independent organization.

HINTSW also has a good knowledge of most of the methods and techniques required by the standards governing functional safety for carrying out the activities listed above.

HINTSW is therefore the natural choice for Companies who need support and advice in the development of programmable electronic systems relevant to human safety.


Tel.: +39 02.2897.0440; +39 02.2871.305

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Commercial contact: +39 348.600.32.82

Registered office: I-20129 Milano, via Plinio 1
Office: I-20127 Milano, via Natale Battaglia, 27

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HINTSW - T&T Systems has been operating for over a decade in the field of functional safety concerning the main industrial sectors and public transport.

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HINTSW division provides highly professional and specialized consultancy in the development of programmable electronic system used in safety-critical applications.

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Safety certification


The safety certification of a system or equipment is often an arduous challenge to win, HINTSW provides all the support and know-how necessary to win.

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HINTSW, drawing from their expertise, offers a wide range of services in the field of vocational training.

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