Envisioning the plan in interaction
The central focus of this chapter is the methods of practical reasoning that accomplish a mutual understanding of relevant objects during the organisation and operation of a plumbing design. To execute successfully the task of coordinating disparate actions in the work, participants must achieve a shared and collective vision of the particular objects under discussion. We emphasise that for objects to be used as interactional resources, they must first be made recognisable and intelligible as interactional accomplishments, though we also suggest that these two analytical issues are inseparable for members when developing a course of practical activity. Objects in our study include tangible artefacts that have physical materiality as well as not-yet-existing abstractions, the designs.