Rizal, Muhammad (2023) Pengendalian Kualitas Produk Steel Wire Sebagai Penyusun Produk Wire Rope Dengan Metode Statistical Process Control (SPC) Pada PT. Wonosari Jaya Surabaya. (Controlling the Quality of Steel Wire Products as a Component of Wire Rope Products Using the Statistical Process Control (SPC) Method at PT. Wonosari Jaya Surabaya). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.
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Abstract
PT. Wonosari Jaya experienced an increase in steel wire production defects during the last 4 months of 2022, with the percentage of defects in September reaching 77%, October 15%, and rising again to 26% in November and December. Analysis using Statistical Process Control (SPC) through Check Sheets, Histograms, Pareto Charts, Control Charts, Cause and Effect Diagrams, and 5W+1H analysis identified discrepancies in several variables, such as steel wire diameter, tensile strength, amount of twist, and zinc coating weight , with the most dominant defect in tensile strength of 62%. The causes of identified defects include human factors, methods, materials, measuring instruments, immersion, environment, machine speed, wire heating, and machine operators. Improvement efforts involve operator training, consistent use of raw materials, consistent coating methods, consistent soaking times, and maintaining a stable ambient temperature. After the repair was carried out by increasing the speed of the Small Drawing small drawing machine, the number of samples of tensile strength defects was reduced from 8 samples to 3 samples. The results of the analysis show an increase in the tensile strength value above the standard after repair, with no significant deviation of the average value or range on the Control Chart Keywords: Statistical Process Control, Steel Wire, Steel Wire Rope
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Statistical Process Control, Steel Wire, Steel Wire Rope |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Fakultas Teknik > Program Studi Teknik Industri |
| Depositing User: | 1411900016 Muhammad Rizal |
| Date Deposited: | 25 Sep 2023 02:44 |
| Last Modified: | 25 Sep 2023 02:44 |
| URI: | http://repository.untag-sby.ac.id/id/eprint/26928 |
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