About the project

The Desiro ML multiple unit, developed and produced by Siemens Mobility GmbH, is in use in Belgium (since 2008), Germany (since 2007) and Austria (since 2015). The model is constantly being developed and adapted to current guidelines and laws. A safety assessment for the Common Safety Methods (CSM) must be carried out for new approvals and any significant changes to the subsequent baselines (e.g. ETCS). This is carried out by a risk assessment body (AsBo) or an independent body.

Furthermore, the multiple units must comply with the requirements of the TSI (Technical Specification for Interoperability) and the NNTR (notified national technical rules).

Our contribution

For the continued use of its Desiro ML vehicle type, Siemens applied for a new approval based on the current 2019 edition of the TSI for the various subsystems for vehicles. The Desiro ML vehicles of ÖBB (series 4744 and 4746) from Siemens were originally approved on the basis of the TSI 2011 edition.

Under the quality management of SCONRAIL AG selected experts from Enotrac carried out the independent safety assessment of the common safety method (CSM) as the risk assessment body for the initial approval of the Desiro ML for ÖBB (and other operators such as VMV, ODEG, etc.), as well as the assessment of significant changes to the subsequent baselines. For this purpose, Enotrac assessed Siemens’ risk management process and prepared inspection notes (questions/findings), which were discussed and clarified with Siemens. Subsequently, the final safety assessment report was prepared.

Furthermore, Enotrac’s experts carried out the assessment of compliance with the requirements of the TSI as a notified body (NoBo) and the applicable NNTR in Germany as a designated body (DeBo).

  • Customer

    Siemens Mobility GmbH

  • Period

    2013 – 2022

  • Location

    Germany, Austria

Our services in the project

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