Identifikasi Presentase Defect Hasil Cetak Pada Mesin Heidelberg Speedmaster CX104 Di PT Gelora Aksara Pratama

Print quality plays an important role in the printing industry because it directly affects the final product. This study aims to identify the types of defects, measure the defect rate, and examine the factors causing defects in the offset printing process using the Heidelberg Speedmaster CX104 at PT Gelora Aksara Pratama. The methodology used includes observation, interviews, documentation, and literature review. The materials analyzed consist of printed covers and text pages on Art Carton (AC), Art Paper (AP), Matte Paper (MP), and Ivory paper. The quality control methodology integrates the Seven Tools approach, executed structurally through Check Sheet, Pareto Chart, Fishbone Diagram, Stratification, Histogram, Scatter Diagram, and Control Chart. The findings show that the defects encountered are scumming, color variation, and misregistration. The Fishbone Diagram analysis indicates that human (man), machine, material, method, and environmental factors all contribute to the occurrence of defects. Based on the final calculation, the actual rejection rate is 0,22%. This percentage proves that the print quality meets the company's established standard as it remains below the maximum allowable tolerance rate of 0,23%.

Kualitas hasil cetak merupakan salah satu aspek penting dalam industri percetakan karena memengaruhi mutu produk yang dihasilkan. Penelitian ini bertujuan untuk mengidentifikasi jenis defect, menghitung persentase defect, serta mengidentifikasi faktor-faktor penyebab defect pada proses cetak offset menggunakan mesin Heidelberg Speedmaster CX104 di PT Gelora Aksara Pratama. Metode yang digunakan meliputi observasi, wawancara, dokumentasi, dan studi pustaka. Objek penelitian terdiri atas hasil cetak cover dan isi pada kertas Art Carton (AC), Art Paper (AP), Matte Paper (MP), dan Ivory. Metode menggunakan Seven Tools, yang diterapkan secara terstruktur meliputi Check Sheet, Pareto Chart, Fishbone Diagram, Stratifikasi, Histogram, Scatter Diagram, dan Control Chart. Hasil identifikasi menunjukkan jenis defect yang ditemukan meliputi scumming (kotor), beda warna, dan misregister. Hasil analisis Fishbone Diagram membuktikan bahwa faktor manusia (man), mesin (machine), material (material), metode (method), dan lingkungan (environment) berkontribusi terhadap munculnya defect. Berdasarkan perhitungan akhir, diperoleh persentase reject riil sebesar 0,22%. Angka ini membuktikan kualitas hasil cetak telah memenuhi standar karena berada di bawah batas maksimum toleransi perusahaan sebesar 0,23%.