DL E&C (375500.KS) has achieved zero defect rulings from the Ministry of Land, Infrastructure and Transport (MOLIT) for four consecutive years since 2023.
DL E&C said Sunday that it recorded zero defect cases in defect ruling statistics compiled by MOLIT's Defect Review and Dispute Mediation Committee from last year through February this year. The company also ranked first among the top 10 construction firms by construction capability evaluation in cumulative defect rulings over five years.
Behind the achievement is a four-step quality control process applied across the entire construction cycle. The process consists of pre-construction site quality training, full inspection of 30 mandatory items, 24 core quality inspections, and data analysis and review.
The company conducts intensive training for quality managers before construction begins. During the construction phase, all 30 mandatory items that must be fulfilled are subject to full inspection. Core quality inspections also cover 24 items that have high defect rates or are prone to being overlooked. The company continuously verifies compliance to prevent quality variations across sites and standardizes quality levels upward.
After completion, defects are analyzed in detail by trade and type through a mobile defect management system and data analytics. The headquarters quality department in particular conducts preemptive inspections of common areas at sites one to three years after completion. Inspections cover not only critical defects such as cracks and leaks but also functional defects including lighting failures and inadequate landscaping maintenance. Drones are deployed for areas difficult to visually inspect, such as retaining walls and slopes.
The company is also differentiating itself in customer service. It operates a customer contact center where the headquarters directly monitors customer inquiries from project sites nationwide. The center uses AI speech-to-text (STT) technology to analyze customer voice data and improve satisfaction levels.
"Customer satisfaction from strengthened quality control is a construction company's competitiveness," a DL E&C official said. "We will continue to lead quality innovation through meticulous management that meets customer expectations."