Taufiqi, Muhammad Salam (2018) Pengendalian Kualitas Gula Kristal Putih (GKP) di PG Tjoekir Jombang (PTPN X) Menggunakan Diagram Kontrol Multivariat Berbasis Time Series. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
PG Tjoekir Jombang merupakan salah satu unit usaha dari PTPN X yang bergerak pada bidang pengadaan gula. Salah satu produk utama yang dihasilkan oleh PG Tjoekir Jombang adalah Gula kristal putih yang harus memenuhi kriteria Standar Nasional Indonesia (SNI). Karakteristik kualitas yang digunakan adalah warna larutan gula (ICUMSA) dan Besar Jenis Butir. Kedua karaktestik tersebut memiliki hubungan yaitu jika semakin kecil BJB maka ICUMSA akan semakin putih, hal itu menjelaskan jika semakin putih maka kualitas gula kristal putih semakin baik. Proses monitoring kualitas gula kristal putih dilakukan untuk menjaga kualitas dari gula yang dihasilkan oleh PG Tjoekir Jombang. Pengendalian kualitas menggunakan diagram kontrol multivariat berbasis time series lebih sesuai digunakan karena asumsi yang harus terpenuhi adalah tidak adanya autokorelasi antar pengamatan. Diagram kontrol dibangun berdasarkan hasil residual oleh model terbaik yaitu dengan menggunakan model VAR (3). Hasil diagram kontrol menunjukkan bahwa variabilitas dan rata-rata proses belum terkendali secara statistic. Salah satu penyebabnya adalah terjadinya kerusakan pada mesin saat sedang beroperasi dan faktor tenaga kerja.
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PG Tjoekir Jombang is one of business unit of PTPN X which is engaged in the field of sugar production. One of the main products produced by PG Tjoekir Jombang is white crystal sugar that meets Indonesian National Standard (SNI). Characteristics of quality used is sugar color (ICUMSA) and Grain Types. Both characteristics have relationship that is if the smaller the grain types, the sugar color will be more white, it explains if the crystal sugar is more white so that the quality of crystal sugar is better. Monitoring process of white crystal sugar quality is done to maintain the quality of sugar produced by PG Tjoekir Jombang. Quality control using multivariate control chart based on time series is preferred because the assumption that must no autocorrelation between observations. The control chart is made based on residual results which generated by the best model obtained. The best model is by using VAR (3)and the result of control chart shows that variability and average of the process are not statistically controlled yet. One of the causes is damaging machine happend while it is being operated, employees factor and several factors.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSSt 519.86 Tau p-1 3100018076521 |
| Uncontrolled Keywords: | Diagram Kontrol, Multivariat, Residual, Time Series, VAR |
| Subjects: | Q Science Q Science > QA Mathematics Q Science > QA Mathematics > QA276 Mathematical statistics. Time-series analysis. Failure time data analysis. Survival analysis (Biometry) |
| Divisions: | Faculty of Mathematics, Computation, and Data Science > Statistics > 49201-(S1) Undergraduate Thesis |
| Depositing User: | salam taufiqi |
| Date Deposited: | 30 Jul 2018 05:14 |
| Last Modified: | 26 Nov 2020 04:57 |
| URI: | http://repository.its.ac.id/id/eprint/54899 |
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