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All Journal Jurnal Sains dan Seni ITS IPTEK Journal of Proceedings Series JTAM (Jurnal Teori dan Aplikasi Matematika) Inferensi Madaniya Sewagati
Hidayatul Khusna
Department Of Statistics, Institut Teknologi Sepuluh Nopember
Religion Arts Humanities Computer Science & IT Decision Sciences, Operations Research & Management Education Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Public Health Social Sciences Other

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Workshop Pengendalian Kualitas Statistika Dasar bagi Staf PT Petrokimia Gresik Hidayatul Khusna; Muhammad Mashuri; Wibawati Wibawati; Muhammad Ahsan; Agus Suharsono; Diaz Fitra Aksioma; Novri Suhermi
Madaniya Vol. 4 No. 4 (2023)
Publisher : Pusat Studi Bahasa dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53696/27214834.665

Abstract

Sebagai perusahaan pupuk yang menjadi anggota holding PT. Pupuk Indonesia (Persero), produk yang dihasilkan PT Petrokimia Gresik sangat diperlukan baik untuk memenuhi kebutuhan pupuk dalam negeri maupun untuk kebutuhan eskpor. Guna menjaga dan meningkatkan kualitas proses produknya, selama ini PT Petrokimia Gresik telah melaksanakan monitoring kualitas, tetapi masih menggunakan diagram yang bersifat univariat, terpisah dalam memonitor target dan variabilitas, dengan batas kontrolnya menggunakan spesifikasi produk. Pengontrolan kualitas semacam itu tidak salah, tetapi kurang efektif dan belum memiliki kemampuan prediktif, sehingga terjadinya penyimpangan proses tidak dapat diantisipasi. Untuk itu diperlukan pelatihan bagi staf bagian Quality Control (QC) sehingga mampu melakukan monitoring dengan metode Statistika yang tepat. Oleh karena itu, tim dosen dari Lab Statistika Bisnis dan Industri (LSBI) Departemen Statistika ITS memberikan workshop pengendalian kualitas Statistika dasar bagi staf QC PT Petrokimia Gresik. Kegiatan tersebut dilaksanakan pada tanggal 29 hingga 30 Mei 2023 dengan keluasan materi mencakup tujuh alat statistika, diagram kendali variabel, serta diagram kendali atribut.
Pengendalian Kualitas Semen PCC di PT Semen Bosowa Banyuwangi Menggunakan Maximum Half-Normal Multivariate Control Chart (Max-Half-Mchart) I Melda Puspita Loka; Hidayatul Khusna; Diaz Fitra Aksioma
Inferensi Vol 7, No 1 (2024)
Publisher : Department of Statistics ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27213862.v7i1.16247

Abstract

Cement is a building adhesive material produced from clinker and has the main ingredients in the form of calcium silicate and additional gypsum. The Indonesian Cement Association (ASI) states that there will be an increase in domestic cement consumption by 5.5% in 2021. Competition in the industrial sector is quite tight, causing PT Semen Bosowa Banyuwangi maintain and improve the quality of its products continuously. One of the steps taken is to check for blaine, residual, and free lime through the laboratory before the cement is distributed. Since there are more than one quality characteristic of Portland Composite Cement (PCC) and each quality characteristic is monitored every shift, the control chart used is a multivariate control chart for individual observations in the form of a Max-Half-Mchart. The Max-Half-Mchart for individual observation can effectively monitor mean and process variability simultaneously. PCC cement quality control using the Max-Half-Mchart in phase I showed that the process was statistically controlled. In phase II, there were out of control observations identified as a shift in the average process. The multivariate process capability measurement results obtained a 〖MC〗_pk value of 1.053, which means that the overall production of PCC cement complies with company regulations.
Co-Authors Agus Suharsono Ahsan, Muhammad Anindiatie Parastikasari Dedy Dwi Prastyo Diaz Fitra Aksioma Diaz Fitra Aksioma Dwitiya Khansa N Dzakiyah Agustin Puspitasari Febriola Rania Trihelmina I Melda Puspita Loka Ilham Maharsa P Imaduddin Wafi Inka Ramadhani Putri Karina Endriana Grace Alvionita Lutfi Nur Aini Marita Qori'atunnadyah Maya Kencana Wulandari Mohammad Hafidz Al Habib muhammad mashuri Siti Azizah Suhartono Suhartono Suhermi, Novri Wibawati Wibawati Wibawati Wibawati Wibawati Wilda Melia Udiatami