Lean Management Analysis of Major Project Construction Services Southern to Reduce Waste at Pertamina Hulu Sanga Sanga

  ABSTRACT : This Study analyzes the implementation of Lean Management in the flowline construction project at PT Pertamina Hulu Sanga-Sanga (PHSS), with a focus on identifying, evaluating and reducing waste across the value stream. Usinga case study approach, data were collected through questionnaires, field observation and document review. The analysis employed Value Stream Mapping (VSM), Value Stream Analysis Tool (VALSAT), Process Activity Mapping (PAM) and Root Cause Analysis (RCA). The results reveal that waiting is the most dominant waste, caused by material delays, inadequate coordination, access constraints and equipment failures. Defects such as pipe damage and welding errors were also identified, leading to rework and additional costs. Project Risk Management analysis reinforced the need for an integrated material information system, strict quality contro and enhanced coordination. In conclusion Lean Management effectively improves construction efficiency by reducing waste, optimizing cycle time and strengthening risk management. Recommendations include developing a material information system, selecting reliable suppliers, enhancing workforce competencies through Lean training and conducting further research focusing on cost savings and productivity.

KEYWORDS : Lean Management, Waste, Value Stream Mapping, VALSAT, Process Activity Mapping, Project Risk Management.