In my PhD thesis I raise the claim that a main ingredient to successful design collaboration in architecture and engineering is to make sense out of the information that is provided by designers and consultants as early and comprehensively as possible.    The design of buildings has become a task with such a level of complexity that a social effort is required to coordinate and integrate the various worldviews of disciplines involved. In my research I first analyse obstacles to sense-making across collaborating disciplines by investigating the worldviews and priorities of the main parties involved in the design of buildings. I then propose novel ways for exchanging knowledge and generating common understanding between design professionals during early design and I introduce the process of optioneering as one possible method to assist architectural and engineering work practice. I present my work on the computational framework DesignLink that allows users from varying professional backgrounds to gather, evaluate and compare their data for design decision making in teams.    In order to address the above issues, I have embedded myself in the engineering firm Arup in their Sydney and Melbourne offices. There, I have examined methods for communicating and integrating aspects of building performance between designers and design consultants over a period of three years. As part of my research at Arup, I have gained an understanding about the everyday requirements of design professionals for sense-making in collaborative practice