Figure 1: Modular bathroom manufacturing process As this paper focuses on wall panel and modular bathroom manufacturing, the stages of these two processes were examined during the interviews. The bathroom manufacturing and wall panel manufacturing processes were developed based on the interviews, where interviewees were asked about the stages and relationships in the manufacturing processes. The processes of these two are almost the same except for the production stage. The modular bathroom manufacturing process is shown in Figure 1. Figure 2: Prefab wall panel manufacturing process edge preparation. Second coat of paint is applied only if it is especially required. In the fi stage of production, openings (for doors and windows) are prepared. Finished wall panels ; staged based on the installation order in the factory to be delivered to the site. Table 2: Barriers to supply chain integration Prefabrication is about improving efficiency in construction. However, in New Zealand, most of the manufacturing companies are operated based on a project basis and try to achieve a particular project within the timeframe with less automation. Real-time performance measuring systems are not adopted in their companies. Similarly, the prefab manufacturing industry is not attentive in using manufacturing concepts like SCM, to improve their efficiency. However, one of the participants highlighted the usage of Lean Principles to minimise waste (P-10). Figure 3: Barriers and enablers in supply chain integration
