<![CDATA[General Background Industrial sugar manufacturing requires strict quality control across multi-stage production processes to maintain product standards and reduce waste. Specific Background PT PG Candi Baru produces white crystal sugar under standardized raw material criteria but experiences persistent product defects in its finishing operations. Knowledge Gap Detailed empirical statistical analysis connecting process-level variations to specific sugar physical defect categories remains limited in local processing plants. Aims This study evaluates process stability and identifies root causes of product defects at PT PG Candi Baru using Statistical Quality Control tools. Results Pareto analysis reveals that oversized granules ("krikilan" at 11.8%) and undersized dust particles ("debuan" at 10.3%) represent the primary quality failures, with P-chart analysis confirming process instability exceeding upper control limits. Novelty The research maps explicit causal relations between machine vacuum pressure drops, operator inconsistencies, and grain size distribution in sugar manufacturing. Implications Establishing targeted standard operating procedures and preventive machine maintenance schedules will stabilize production quality and reduce defect rates. Key Findings Highlights Oversized sugar granules ("krikilan") and fine dust ("debuan") constitute 22.1% of total production defects. Statistical P-chart analysis demonstrates that defect proportions consistently exceed established upper control limits. Fishbone analysis links quality failures primarily to low evaporator vacuum pressure and unstandardized operator practices. Keywords Statistical Quality Control, Sugar Production, Defect Analysis, Pareto Diagram, Quality Management]]>
