TY - CONF TI - Organizing the Argumentation for Changing the Delivery System Using Choosing by Advantages (CBA) AU - Schöttle, Annett AU - Guerreiro, Rafael AU - Haubrich, André AU - Ditandy, Michael AU - Behme, Fabian AD - Dr.-Ing., Partner, refine Project AG, annett.schoettle@refine.team , Founder and Co-Director, CollabDecisions, orcid.org/0000-0001-6001-7320 AD - Team Lead Project Control, Munich Main Station, DB Netz AG, Rafael.Guerreiro@deutschebahn.com, orcid.org/0009-0000-5339-6561 AD - Head of Engineering, Munich Main Station, DB Netz AG, Andre.Haubrich@deutschebahn.com, https://orcid.org/0009-0008-1541-0447 AD - Head of Project Control, Munich Main Station, DB Netz AG, Michael.Ditandy@deutschebahn.com, orcid.org/0009-0001-9101-850X AD - Dr., Team Lead Contract & Claims Management, Munich Main Station, DB Netz AG, Fabian.Behme@deutschebahn.com, orcid.org/0009-0000-6130-9050 PY - 2023 DA - 2023/06/26 T2 - Proceedings of the 31st Annual Conference of the International Group for Lean Construction (IGLC31) C3 - Proceedings of the 31st Annual Conference of the International Group for Lean Construction (IGLC31) CY - Lille, France SP - 990 EP - 1001 DO - 10.24928/2023/0245 SN - 2789-0015 (ISSN) AB - Megaprojects contain strategic decisions that must be approved outside of the project. A clear and understandable argumentation is required to communicate and push through such decisions. As shown in the literature, Choosing by Advantages (CBA) helps teams create a shared understanding regarding a decision resulting in a strong argumentation of the decision outcome. Therefore, this research aims to better understand how CBA helps to make a strategic decision that impacts all project levels and creates the argumentation to get the approval of the management board of the company. This paper describes why and how the Deutsche Bahn team of the project Munich main station proceeded with the decision to change the project delivery system from design–bid–build (DBB) to integrated project delivery (IPD) while the project was already in different design stages using the CBA tabular method. As all authors (consultant and client) were involved in the research, participatory action research was used as the research approach. The paper demonstrates how CBA (1) helped to create a shared understanding of IPD, (2) helped to understand the scope of the multiparty agreement, (3) helped to organize the argumentation, and (4) helped to create trust regarding the argumentation. KW - Choosing by Advantages KW - collaboration KW - Integrated project delivery KW - megaproject KW - Munich main station. L1 - https://www.iglc.net/papers/details/2174/pdf UR - https://www.iglc.net/papers/details/2174 DB - IGLC.net LA - English N1 - Export date: 04 October 2026 ER -