The paper presents the results of the first phase of the student project CROSTAND2, whose main goal is to revitalize the traditional construction techniques of vernacular architecture in the Republic of Croatia by developing modern sustainable prefabricated modular wooden buildings/public booths in accordance with users’ needs and habits. To incorporate conceptual design, the literature on Croatian construction and wood protection, prefabricated modular construction, and public urban spaces was analyzed and field research was conducted. Photo documentation was also collected in the village of Donja Kupčina, Zagreb County, Croatia. An online survey questionnaire on socializing habits in public spaces, before and during the COVID-19 pandemic, additionally analyzed new requirements for user-centered design. The obtained results, as well as results from previous project research, were used as a basis and inspiration for the design of a conceptual modular building inspired by traditional wooden joints, modular construction, and the emerging needs of users to socialize safely in a healthy environment. Conceptual solutions for a sustainable modular prefabricated wooden building for public use, intended for public urban and rural areas, have been proposed. Such constructions would ensure the sustainability of enjoying the natural environment for personal, tourist, and commercial purposes with the perpetuation of Croatian heritage building traditions.

– Quality is the key to increasing passenger transport by rail and also to the business success of the railway undertaking itself, because the market, whether domestic or international, is conquered with a sufficiently high quality of service and not just a low cost of service. This paper defines the problem of improving the rail passenger service in accordance with customer requirements, and for this purpose, the QFD method was used as a tool for improving the service. Keywords – QFD, quality, passenger transport, railway undertaking.