Colloquium announcement

Faculty of Engineering Technology

Department Design, Production and Management
Master programme Industrial Design Engineering

As part of his / her master assignment

Kathemi, M. Al (Mohammed)

will hold a speech entitled:

Roadmapping in the circular economy; Circular inflow and outflow in passenger trains according to the CTI framework

Roadmapping in the circular economy; Circular inflow and outflow in passenger trains according to the CTI framework - Kathemi, M. Al (Mohammed)


The current ‘take-make-waste’ linear economy is seen as one of the causes behind climate change. Adapting principles of the circular economy (CE) concept can decrease the effects of climate change. The client company, the Nederlandse Spoorwegen (NS), takes responsibility which resulted in this master thesis exploring the field of the circular economy through the development of a roadmap for the realisation of circular economy principles. The main research question is: how can NS realise circular inflow and outflow for their current trains by 2030, using the CTI framework?

According to the Design Science Research approach, a tailor-made roadmap is developed for NS to answer the research question. The principles of the roadmap development are the context, architecture and process. This research generalises the roadmap development process and proposes the CIPS process with four corresponding generic activity groups, as shown in the figure. Consequently, these activity groups can be customised to the context of the circular economy, which results in the generally applicable circular activity groups:

1) establishing a Circular Indicator (CI) framework,
2) creating a total overview of the circularity and the (linear) gaps,
3) analysing the indicator impact,
4) analysing the viability of the proposed strategies and
5) linking the gaps to the impact categories.

The impact categories show the relationship between the indicator impact and the viability to interpret the overall impact of the linear gaps and define the corresponding roadmap strategy.

The proposed circular roadmap development is demonstrated through the NS case study, resulting in a three-layered roadmap that corresponds with the NS lifecycle phases; the inflow , modernisation and outflow of trains.  Each main layer has designated sublayers, impact categories, stakeholders, and a strategy to support the interpretation of the overall impact of the linear material flows. The corresponding timeframes are a timeline from 2020 till 2050, the timeline of the trains, and the short term, mid-term and long term projects timeline.

Finally, based on the insights derived from this research various discussion points related to the CIPS roadmap development, CTI tool and the implementation are highlighted for further thought. Additionally, complications between the circular economy theory and practice are pointed out such as the relation between the circularity and the lifecycle time of a component. Consequently, numerous recommendations are put forward for follow-up research which correspond with sector collaboration and digital innovations for circular data management.