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All Journal eProceedings of Engineering Journal of Industrial and Mechanical Engineering
Febriawan, Najmadan
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Penerapan Metode Dmaic Dalam Pengendalian Kualitas Untuk Mengurangi Produk Cacat Pada Konveksi Hf Mandiri Febriawan, Najmadan; Rachmawaty, Dina; Yanyan Ramdhani, Ade
eProceedings of Engineering Vol. 12 No. 4 (2025): Agustus 2025
Publisher : eProceedings of Engineering

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Abstract

Penelitian ini membahas tingginya cacatproduksi tas gendong bayi di HF Mandiri pada Oktober 2024–Februari 2025. Meskipun kapasitas tetap 50 unit perhari,proporsi cacat naik dari 8,23% menjadi 11,08%. Batasantoleransi proporsi cacat sebesar 10%. Masukan penelitianberupa data produksi, data inspeksi produksi dan observasilingkungan kerja. Keluaran berupa rekomendasi perbaikanmutu dan evaluasi hasil implementasi. Cacat produk yangbertambah berdampak pada biaya dan kepuasan pelanggan.Kondisi saat ini menunjukkan gap mutu pada kualitasproduksi. Penelitian ini menggunakan pendekatan DMAIC bagikonveksi. Solusi dilakukan dengan mengidentifikasi jenis cacatdan menggunakan SIPOC untuk memetakan alur produksiagar dapat diketahui letak tahapan yang sering terjadi cacatproduk, Baseline kualitas produksi menggunakan P-Chart danDPMO, mencari cacat dominan menggunakan pareto diagramdan identifikasi berbagai faktor penyebab masalah melaluifishbone diagram serta 5 Whys untuk pendalaman akarmasalah. Empat tindakan perbaikan diterapkan yaitupenambahan lampu kerja sesuai standar, pembuatan SOP barudalam poster, pergantian jarum dan alat potong secara berkala,serta penempatan QC di area produksi. Hasil menunjukkanDPMO turun dari 33.730,03 menjadi 12.777,78 dan level sixsigma naik dari 3,33 menjadi 3,73, membuktikan solusi yangdiimplementasikan efektif meningkatkan kualitas produksi.Kata kunci— DMAIC, konveksi, sigma, DPMO
Perencanaan Persediaan Bahan Baku Semen Menggunakan Pendekatan Min-Max Inventory Berbasis Peramalan Febriawan, Najmadan; Winati, Famila Dwi; Larasati, Karina Amanda
Journal of Industrial and Mechanical Engineering Vol 3 No 1 (2025)
Publisher : Department of Industrial Engineering, Universitas Jenderal Soedirman.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jimien.2025.3.1.16231

Abstract

PT Solusi Bangun Indonesia is a cement manufacturing company that utilizes FABA (Fly Ash and Bottom Ash) as one of its supplementary raw materials. A significant issue faced by the company is the overstock of FABA, which contributes to increased storage costs and poses a risk of environmental pollution. This research aims to develop an optimal inventory planning strategy for FABA by integrating time series forecasting methods with a min-max inventory control policy. The study utilizes historical FABA demand data from July 2023 to June 2024. Three forecasting techniques are applied: moving average, weighted moving average, and exponential smoothing. Accuracy evaluation indicates that the moving average method with a parameter of n = 3 produces the lowest forecasting error, as measured by MSE and MAD. The forecasting model is further validated using the Moving Range Chart to ensure its stability and reliability. The calculated safety stock at a 95% service level is 191.34 tons, with a minimum inventory of 758.83 tons and a maximum of 1,326.31 tons. This forecasting-based min-max policy effectively enhances inventory efficiency, mitigates risks of overstock and stockout, and supports operational sustainability.
Co-Authors Dina Rachmawaty Famila Dwi Winati Karina Amanda Larasati Yanyan Ramdhani, Ade