Perusahaan mempunyai target toleransi cacat yaitu sebesar 0,5% per hari. Setelah dilakukan observasi awal, rata-rata produk cacat perhari selama satu bulanadalah 0,6%, yang artinya produk cacat melebihi batas toleransi, sehingga pengendalian kualitas dan minimasi cacat perlu untuk dilakukan. Penelitian ini mencoba untuk meminimasi produk dengan menggunakan statistical quality control dan tree diagram, dimana berdasarkan peta kendali proses masih belum terkendali dan ada beberapa proses yang perlu diperbaiki. Berdasarkan diagram pareto, dari 11 jenis cacat terdapat 6 jenis cacat yang berpengaruh dan harus diselesaikan. Kemudian melalui fishbone diketahui terdapat 6 faktor yang mempengaruhi terjadinya cacat yaitu manusia, material, pengukuran, metode, lingkungan, dan mesin. Kata Kunci : Produk Cacat, Statistical Quality Control, Tree Diagram

The company has a defect tolerance target of 0.5% per day. After the initial observation, the average defective product per day for one month is 0.6%, which means the defective product exceeds the tolerance limit, so that quality control and minimization of defects are necessary to do.This research tries to minimize the product by using statistical quality control and tree diagram, which based on the process control chart is still uncontrolled and there are several processes that need to be improved. Based on the pareto diagram, of the 11 types of defects there are 6 types of defects that affect and must be resolved. Then through the fishbone known there are 6 factors that affect the occurrence of defects are human, material, measurement, method, environment, and machine. Keywords: Defective Product, Statistical Quality Control, Tree Diagram

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