Analisis Pengendalian Kualitas Green Bean Kopi Menggunakan Metode Statistical Process Control (SPC) di Kopi Bontugu Trawas Kabupaten Mojokerto

Adelia, Kevlin (2026) Analisis Pengendalian Kualitas Green Bean Kopi Menggunakan Metode Statistical Process Control (SPC) di Kopi Bontugu Trawas Kabupaten Mojokerto. Undergraduate thesis, UPN Veteran Jawa Timur.

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Abstract

Quality control is essential to ensure that Arabica green coffee beans comply with established quality standards. This study aimed to determine the defect level, evaluate the stability of the production process, and identify the causes of defects and the corresponding corrective actions in the production of Arabica green coffee beans at Kopi Bontugu, Trawas, Mojokerto Regency. The analysis employed the Statistical Process Control (SPC) approach using check sheets, Pareto diagrams, p-control charts, and cause-and-effect diagrams. The results revealed that total defects amounted to 33,489 grams out of 319,500 grams of production. Broken beans and perforated beans were the predominant defects, accounting for a cumulative 90.2% of all defects. The p-control chart indicated that the process was not yet statistically under control, as several observations exceeded the control limits. Cause-and-effect analysis showed that broken beans were primarily associated with raw material, machine, and method factors, whereas perforated beans were related to human, method, and environmental factors. Improvement efforts should focus on selective harvesting, moisture control prior to hulling, regular machine maintenance, more rigorous sorting practices, and the provision of proper storage facilities. Keywords: Quality control, Statistical Process Control, Coffee Green Beans

Item Type:

Thesis (Undergraduate)

Contributors:

Contribution	Contributors	NIDN/NIDK	Email
Thesis advisor	Winarno, Sri Tjondro	NIDN0011025908	sritjondro_w@upnjatim.ac.id
Thesis advisor	Tondang, Ika Sari	NIDN0019069501	ika.sari.agribisnis@upnjatim.ac.id

Subjects:

S Agriculture > S Agriculture (General)

Divisions:

Faculty of Agriculture > Departement of Agribusiness

Depositing User:

Kevlin Adelia

Date Deposited:

31 Jul 2026 08:02

Last Modified:

31 Jul 2026 08:02

URI:

https://repository.upnjatim.ac.id/id/eprint/58334