Development of the Holistic Quality Model and Assessment – Integrating the Economic Quality Aspect and establishing an Extended Interrelation Analysis

A holistic understanding and careful balancing of different quality aspects can support sustainable, evidence-based decisions during the planning and realisation phases of a building. To this end, it is important to consider, whether and to what extent different quality aspects are interrelated in order to assess potential consequences of decisions. For this purpose, the Holistic Quality Model 2.0 is introduced, representing a second iteration of the Holistic Quality Model developed in recent studies. It incorporates two improvements. First, the integration of the economic quality aspect in addition to the technical, environmental and social quality aspects. Second, the development of an extended interrelations methodology to facilitate better identification and quantitative analysis of interrelations. These improvements and a corresponding case study emphasise the shift from the conventional practice of evaluating quality aspects in isolation towards a holistic approach enabling informed decision-making by considering and balancing different quality aspects.