In the era of the 4th Industrial Revolution, smart factories incorporating ICT technology into the manufacturing industry worldwide are becoming a hot topic, and the competitiveness of Korea''s flagship manufacturing industry is weakening and facing limits in growth. In particular, construction materials manufacturing industries such as those of ready-mixed concrete, steel, cement, and asphalt, which are highly dependent on the construction industry, are experiencing difficulties due to the slowdown of economy. In addition, cost reduction and cost competitiveness are becoming important due to increasing costs. To overcome this, continuous smartization and improvement of manufacturing sites are required.

Therefore, this research was conducted to provide direction and guidelines in constructing and upgrading smart factory of construction materials enterprises by conducting a smart factory level diagnosis and comparing and analyzing the results of 21 small and medium-sized construction materials manufacturing SMEs participating in the government support project of the smart factory.

As a result, the diagnosis result was based on the basic level of Smart Factory Level 1, showing partial standardization and management of performance record. By type, new construction companies were level 0 ~ 1 level, and advanced construction companies were level 1 ~ 2 level.

The scores between the diagnosis areas of new and advanced smart factory companies were compared and analyzed by each area. Through this, it is important to build a smart factory through business processes such as documentation of production planning process and standardization of basic information when building a smart factory. Furthermore, in order to advance to the advanced stage, system-to-system integration and data utilization is highly recommended.

Lastly, based on the results of the diagnosis, we devised the necessary technical tasks and analyzed the priorities for each task to derive short-term, medium-term, and long-term tasks to present a strategic roadmap. In the case of new construction, issues related to factory site basics, facility automation, business processes, and standardization of basic information were presented. In case of upgrading the factory, issues related to facility-system linkage, information system, system-system linkage, and data utilization were presented.