This research applied a descriptive-correlational methodology to examine the relationship between Lean Management specifically 5S, Just-in-Time, Kanban, Kaizen and warehouse inventory efficiency. In total, 54 responses from questionnaires distributed via a Likert scale were analyzed using Weighted Mean, Shapiro-Wilk, Spearman's Rho, and Simple Linear Regression to determine the effects on accuracy, turnover, cycle time, and order fulfilment. The outcomes suggested that the techniques were widely implemented and that efficiency was high. Statistical analysis provided evidence of a significant relationship whereby lean management is attributed for more than 50% of the total variance from the outcome thus null hypotheses are rejected. It was also noted that while kaizen and 5s were more dominant as previous drivers for achieving this, operational speed was also found to be more evident than accuracy/precision regarding the use of visual controls & reducing shrinkage. An improvement plan matrix was submitted, with a digitally-integrated Kanban and Kaizen workshop expected to maintain quality and assist in obtaining ISO 9001 Certification.