Design align : integrating the pairwise comparison method for decision-making in the preliminary design of bridges

Abstract

Effective communication and decision-making between clients and design teams are essential for developing optimal transportation solutions, particularly in bridge design. This paper explores the use of the pairwise comparison method, for selecting the preferred design solution by evaluating and prioritising various constraints. Possible key constraints could include construction cost and time, maintenance, safety, aesthetics, environmental and social considerations, driver comfort, as well as the potential for future expansion. The pairwise comparison method involves comparing the relative importance of each constraint against the others, using a weighted scoring system. Quantifiable constraints, such as construction cost and time, are assigned specific values, while non-quantifiable factors, such as safety and aesthetics, are evaluated with a preference rating. This process ensures a clear ranking of priorities, allowing both clients and design teams to align on key project goals and facilitates effective communication. Additionally, the method's flexibility allows for quick adjustments in response to stakeholder feedback, enabling the design team to re-evaluate the constraints and propose new design solutions as needed. Ultimately, this approach leads to a more collaborative and informed decision-making process, where clients gain a balanced understanding of the requirements and constraints, resulting in the preferred bridge design solution that meets both technical and stakeholder needs.