Monitoring The Quality Of Corrugated Medium Paper (CMP) Using Maximum Half-Normal Multivariate Control Chart (Max-Half-Mchart)

Assidiq, Muhammad Hafidz (2024) Monitoring The Quality Of Corrugated Medium Paper (CMP) Using Maximum Half-Normal Multivariate Control Chart (Max-Half-Mchart). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Corrugated Medium Paper (CMP) atau dikenal juga dengan karton flute merupakan salah satu bahan baku yang digunakan dalam produksi kertas kardus bergelombang yang biasa digunakan dalam industri pengemasan. PT XYZ adalah salah satu produsen kertas kemasan terkemuka di Indonesia dengan kapasitas produksi gabungan terpasang lebih dari 1,5 juta ton per tahun. Persaingan di bidang industri pengemasan yang cukup ketat menyebabkan PT XYZ terus menjaga dan meningkatkan kualitas produk yang dihasilkan. Salah satu langkah yang dilakukan oleh PT XYZ untuk menjaga kualitas kertas yang dihasilkan adalah dengan melakukan monitoring properti fisik berupa grammature, ring crush, concora, moisture, dan cobb test melalui laboratorium quality control sebelum kertas dikemas dan dipasarkan. Karena terdapat lebih dari satu karakteristik kualitas kertas CMP dan masing-masing karakteristik kualitas dimonitor satu kali dalam tiap shift, maka diagram pengendali yang digunakan adalah diagram pengendali multivariat untuk pengamatan individu. Diagram pengendali yang digunakan untuk memonitor kualitas kertas CMP adalah diagram simultan multivariat Max-Half-MChart. Penggunaan diagram Max-Half-MChart didasarkan pada pertimbangan bahwa pengamatan bersifat individual, karakteristik kualitas lebih dari satu dan saling berkorelasi. Di samping itu, diagram Max-Half-MChart dapat memonitor target dan variabilitas secara bersama-sama, sehingga lebih efisien. Pengendalian kualitas kertas CMP menggunakan Max-Half MChart pada Tahap I menunjukkan adanya tiga observasi out of control yang mengidentifikasi adanya pergeseran rata-rata proses. Pada Tahap II menunjukkan bahwa diagram Max-Half-MChart terkendali secara statistik. Penyebab terjadinya tidak terkendalinya kertas CMP di PT XYZ adalah karena perbedaan sumber bahan baku, artinya bahan baku mempunyai karakteristik yang berbeda-beda sehingga menyebabkan mesin tidak stabil dalam memaksimalkan hasil produksi. Hasil pengukuran kapabilitas proses produksi kertas CMP di PT XYZ secara multivariat diperoleh nilai MCpk sebesar 2,53 yang berarti hasil produksi kertas CMP secara keseluruhan telah sesuai dengan ketentuan perusahaan, sehingga proses dapat dikatakan telah kapabel.
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Corrugated Medium Paper (CMP), known as flute cardboard, is one of the raw materials used in the production of corrugated cardboard which is commonly used in the packaging industry. XYZ Inc. is one of the leading packaging paper producers in Indonesia with a combined installed production capacity of more than 1.5 million tons per year. Competition in the packaging industry is quite tight, causing XYZ Inc. to continuously maintain and improve the quality of its products. One of the steps taken by XYZ Inc. to maintain the quality of the paper produced is by monitoring physical properties in the form of grammature, ring crush, concora, moisture, and Cobb tests through a quality control laboratory before the paper is packaged and marketed. Because there is more than one quality characteristic of CMP paper and each quality characteristic is monitored once in each shift, the control chart used is a multivariate control chart for individual observations. The control chart used to monitor the quality of flute cartons is the Max-Half-MChart multivariate simultaneous control chart. The use of the Max-Half-MChart control chart is based on the consideration that observations are individual, there is more than one quality characteristic, and they are correlated. In addition, the Max-Half-MChart can monitor targets and variability together, making it more efficient. CMP paper quality control using the Max-Half MChart in Phase I shows that there are three out of control observations that identify shifts in the average process. In Phase II shows that the Max-Half-MChart is statistically controlled. The cause of the observation of CMP paper out of control at XYZ Inc. is due to differences in raw material sources, meaning that raw materials have different characteristics, causing the machine to be unstable in maximizing production results. The results of measuring the capability of the CMP paper production process at XYZ Inc. in a multivariate manner obtained a value of MCpk of 2.53, which means that the overall CMP paper production results are in accordance with company regulations, so the process is capable.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	CMP Paper, Quality Monitoring, Kertas CMP, Max-Half-MChart, Monitoring Kualitas.
Subjects:	T Technology > TS Manufactures > TS156 Quality Control. QFD. Taguchi methods (Quality control)
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Statistics > 49201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Hafidz Assidiq
Date Deposited:	22 Feb 2024 01:05
Last Modified:	22 Feb 2024 01:05
URI:	http://repository.its.ac.id/id/eprint/107651

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