Creating Reliability in Concrete Construction—Achieving Quality Within a Complex Sociotechnical System Marton Marosszeky (BCRC, WSU), Frank Papworth (BCRC), Bob Munn (BCRC) and Marius du Preez (BCRC) Abstract: Commercial pressures in construction push all construction processes to reach for faster speed and lower cost, creating a constant push for organisational and technical innovation. Under these commercial pressures construction has adopted more and more fragmented supply chains for project delivery, creating numerous interfaces between parties as well as potential points of weakness. Failure to achieve the desired quality and durability standards arises from ineffective or insufficient communication and problem resolution, early in the process. It is critical that all measures that ensure excellence in all aspects of design, production, planning, and site work be adopted simultaneously with the required on-site training and supervision. Fib Bulletin 44 (2008) introduced the idea that cast in situ concrete is a Special Process and that an Execution Plan should be developed to ensure that the design intent is achieved. Such an approach provides a framework for work planning and execution that involves all parties. An additional requirement is effective and deep collaboration across the entire supply chain to ensure that everyone’s potential to contribute is tapped. This paper presents the case for Execution Planning in project delivery. Keywords: Concrete, project management, quality, sociotechnical, complex construction 1. Fragmentation of the Construction Process With construction projects becoming more complex, there is a growing demand for specific expertise in various trades and disciplines. These include supply and installation of structures, facades, electrical work, plumbing, HVAC systems, elevators and escalators to name a few. The fragmentation allows for greater specialisation and the utilisation of specialised skills and knowledge. General contractors often seek to reduce costs by subcontracting specific tasks to specialised firms that can perform them more efficiently and at a lower cost. By subcontracting, the risk associated with each specialised task can be managed by the subcontractors. This risk allocation strategy allows the main contractor to mitigate potential liabilities and minimise exposure to project risks and allows them to focus on their core competencies. However, it is a proven fact that all risk cannot be shed by the general contractor since the ultimate responsibility for delivering the client ’s requirements is theirs. Within concrete construction this has led to the emergence of specialists who deal with concrete mix design, concrete supply, concrete pumping, concrete placing, falsework erection, formwork construction, reinforcement scheduling, fabricated reinforcement supply, pre-fabrication of reinforcement cages, reinforcement installation, installation of precast elements and post tensioning. Fragmentation in the supply chain can facilitate innovation and the adoption of new technologies as specialised subcontractors often have in-depth knowledge and experience in specific areas, allowing them to develop innovative solutions or leverage advanced technologies within their respective domains. By tapping into the expertise of these specialised firms, construction projects can benefit from the latest advancements in materials, construction methods and technology applications. Fragmentation also offers greater flexibility and scalability in construction projects, and contractors can easily engage and disengage subcontractors as needed, enabling more efficient resource allocation. However, while fragmentation offers various advantages, it also presents challenges. Outstanding communication and coordination among the numerous subcontractors are crucial to ensure smooth project execution. Collaboration and integration efforts are required to overcome potential conflicts or gaps in information sharing. Achieving seamless collaboration is significantly more difficult in a fragmented supply chain than within a single organisation. Nonetheless, the trend towards greater specialisation and fragmentation in construction continues as the industry seeks to optimise costs, manage risk and leverage specialised expertise for improved project outcomes. 2. Managing Quality Within Complex Sociotechnical Systems From a sociotechnical perspective, construction involves interaction between skilled people with shared construction norms working towards the goal of constructing a structure following defined processes, using known technology and operating within the boundaries of the project. Nowadays, this is described as a typical sociotechnical system (Figure 1).