A Study on the Process Innovation of Public Facility Maintenance as a Social Infrastructure: The Case of Seoul Metropolitan Rapid Transit

Of total 24,156 units of escalators that are in operation in Korea as of December 2011, 902 units (or 3.73 percent) of them are installed in subway stations. Escalators as a public use facility in social infrastructure offer an important convenience to passengers. Recently perception to public facility maintenance has been shifted from facility management to asset management. This is because if public use facilities are maintained in the perspective of asset management taking preventive measures against aging and malfunctioning, their life expectancy may become longer and the budget related to the maintenance can be optimized. In the study, the researchers studied subway escalators as social infrastructure in the perspective of asset management, and proposed to use a model that can optimize the budget spending with reasonable maintenance in terms of process innovation.