The International Conference on Rigorous State-Based Methods (ABZ 2023) was an international forum for the cross-fertilization of related state-based and machine-based formal methods, mainly Abstract StateMachines (ASM), Alloy, B, TLA +, VDM and Z. Rigorous state-based methods share common conceptual foundations and are widely used in both academia and industry for the design and analysis of hardware and software systems. The acronym ABZ was invented at the first conference, held in London in 2008, where the ASM, B and Z conference series merged into a single event. The second ABZ 2010 conference was held in Orford (Canada), where the Alloy community joined the event; ABZ 2012 was held in Pisa (Italy), which saw the inclusion of the VDM community (but not in the title); ABZ 2014 was held in Toulouse (France), which brought the inclusion of the TLA + community into the ABZ conference series. Lastly, the ABZ 2016 conference was held in Linz, Austria and ABZ 2018 in Southampton, UK. In 2018 the steering committee decided to retain the (well-known) acronym ABZ and add the subtitle ‘International Conference on Rigorous State-Based Methods’ to make more explicit the intention to include all state-based formal methods. Two successive ABZ events have been organized in Ulm (Germany) and these were the two first virtual ABZ events. Since 2014 in Toulouse, each ABZ asked for the application of formal specifications on industrial case studies. This year, we extend the previous areas (aerospace, medical equipment, rails, automotive) with the HMI domain. The ABZ 2023 case study intro- duces a safety critical interactive system called AMAN (Arrival MANager), which is a partly autonomous scheduler of landing sequences of aircraft in airports. This interactive system interleaves Air Traffic Controller’s activities with automation in AMAN. While some AMAN systems are currently deployed in airports, we consider here only a subset of functions which represent a challenge in modelling and verification. The ABZ 2023 case study is provided by José C. Campos and Philippe Palanque, who have interacted with authors of submissions for the case study and did a great job while managing the review process of the five submissions in five different modelling languages, namely B, Event-B, ASM, Alloy and Statecharts. They accepted four of those submissions for presentation at ABZ 2023 and inclusion in the proceedings. As usual, a special issue will be organized in a Springer journal for a larger audience and inviting other replies to the ABZ 2023 case study. José and Phil answered almost a hundred questions and gave clarifying explanations, for which we would like to thank them. The objective of these case studies is to provide an opportunity to demonstrate the applicability of the ABZ methods to real examples and also to allow a better comparison of them. You should visit the link https://abz-conf.org/case-studies/ which collects the past case studies with solutions.