Improvement of DEET level of product X using Deming cycle (PDCA Method) in PT Z

Abstract

DEET is a complex compound that is used as an active ingredient in the manufacture of insect repellent products. PT Z is one of the sub-contracting companies that manufacture mosquito coils from PT XYZ with product X. PT Z received complaints from PT XYZ claiming that DEET levels in a tested batch were below the specified specifications. PT Z needs to conduct an internal assessment and investigation to find the cause of the release of DEET levels from the specification range. The research was carried out with a Deming cycle, namely the sub-stage PDCA method. Based on the results of the investigation, the decrease in DEET levels is caused by the inhomogeneity of DEET in the product because the mixing process is only done in 5 minutes, so it is necessary to optimize the mixing time. Both parties have agreed on corrective and preventive actions in the form of a revalidation process by determining the best mixing time, which is 20 minutes, which produces a DEET level of 32.58%. Validation is carried out for three consecutive batches with all batches showing DEET results that meet the specified product specifications.