Requirements for battery vehicles
Customer: SBB AG, Switzerland
Project tasks
- Review of the standard requirements catalogue
- Classification of the requirements
- Categorisation and adaptation of requirements
- Integration of the requirements into the requirements management system
- Evaluation of the offers
- Conversion and import of the requirements specification
Our Approach
Swiss Federal Railways SBB is preparing for the tender to procure new vehicles that replace the Tm 234 fleets of the first, second, and third series. These new vehicles must fulfil the operational requirements of both existing fleets and be climate-neutral. As the Federal Office of Transport (FOT) has yet to approve finalised regulations for battery-powered vehicles, SBB is facing challenges regarding the approval of battery operation. Therefore, SBB needs support for the battery subsystem to correctly integrate the specific requirements for the battery system into the specifications.
PROSE supported SBB in reviewing the content of the standard requirements catalogue for the battery subsystem (SAK – System Batterie). The task included not only suggesting content adjustments and additions but also classifying the requirements into functional and non-functional categories. In addition, PROSE categorised and adapted the requirements according to the “MUST” and “SHOULD” criteria and submitted proposals for weighting these criteria for the evaluation matrix.
Based on this preliminary work, the specified requirements were integrated into the requirements management system Re-qSuite®. There, the requirements were evaluated individually, and a corresponding binding force was given to evaluate the bids received in the upcoming tender. The specifications were then converted into a format that SBB could import into its requirements management system, Polari-on®.
Customer benefit
SBB received a clear catalogue of questions and an annotated requirement specification, which made the requirements more precise and easier to understand. Checking, evaluating, and identifying requirements that require a risk assessment contribute to quality assurance and minimise potential risks in the project. The risk assessment and the binding nature of the requirements enable better preparation for the tender, which improves the quality of the bids received. Converting the specifications into a compatible format for SBB’s requirements management system ensures smooth integration and utilisation of the requirements by the customer.
