Analisis pengendalian deviasi waktu dan mutu pekerjaan perkuatan struktur gedung lantai 7 di Tangerang melalui Total Quality Management (TQM)

Structural strengthening projects on existing buildings often experience technical deviations due to differences between design assumptions and actual site conditions. In the structural strengthening project of the 7th floor of a building in Tangerang, key issues included slab deflection, insufficient anchor embedment depth caused by reinforcement obstruction, and misalignment of existing beam geometry relative to design drawings. If not properly managed, these deviations can increase corrective working time and compromise technical quality. This study employed a quantitative descriptive approach using a case study method. Field observations were conducted at 103 deviation points, consisting of 29 slab deflection points, 22 anchor embedment depth deviations, and 52 deviations related to existing beam misalignment. Data were obtained through direct measurements, site documentation, and recording of corrective working time. Descriptive statistics, Pearson correlation, and simple linear regression were applied, followed by the implementation of a Total Quality Management (TQM) strategy using the Plan–Do–Check– Action (PDCA) cycle. The results show strong to very strong correlations between technical deviations and corrective working time. Slab deflection (r = 0.8635), anchor embedment depth deviation (r = 0.92), and beam misalignment (r = 0.78) significantly affected time performance. The TQM–PDCA implementation reduced corrective working time from approximately 270 hours to 200 hours while meeting quality requirements. The application of TQM through the PDCA cycle is demonstrated to be effective in controlling time deviations and maintaining technical quality in structural strengthening projects under non-ideal existing conditions.