ANALYSIS OF DEFECTS IN U-DITCH CONCRETE USING DMAIC METHOD AND RCA METHOD

• Risha Siti Aliyah

  Universitas Muhammadiyah Sidoarjo, Indonesia

• Inggit Marodiyah

  Universitas Muhammadiyah Sidoarjo, Indonesia

Objective: This study aims to analyze the causes of defects and minimize their occurrence in PT XYZ, a concrete company producing U Ditch concrete, which has a defect standard of 0.1%. The percentage of defects from January to November 2023 exceeded this standard. Method: The methods used in this study are DMAIC (Define, Measure, Analyze, Improve, Control) and RCA (Root Cause Analysis). DMAIC is employed to define the level of defect control, while RCA is applied to analyze the root causes of the defects. Result: The results indicate that the highest causes of defects are related to the worker factor, which includes frequent human errors; the material factor, where materials do not meet standards; the machine factor, with inadequate calibration; and the production environment factor, which is still carried out in an open space. The DPMO (Defects Per Million Opportunities) value of PT XYZ is 46,557, meaning there is a possibility of 46,557 defective products per one million products produced. Novelty: The study highlights the importance of a comprehensive analysis using DMAIC and RCA to address the root causes of defects in production processes, which can help the company achieve quality standards and minimize product defects.

Amrin M and M Hul Jannah, “PENENTUAN STRATEGI PEMASARAN BETON SIAP PAKAI PADA PERUSAHAAN PT. VARIA USAHA BETON CABANG MAKASSAR,” Pros. Semin. Nas. Teknol. Ind. IX, vol. 1, pp. 100–106, 2022.

I. Marodiyah and I. Sudarso, “Analisa Risiko Guna Peningkatan Kualitas Proses Pembangunan Gedung Bertingkat,” Tekmapro: Journal of Industrial Engineering and Management, vol. 15, no. 2, pp. 49-60.

A. N. Rohkma and Enny Aryanny, “Analisa Tingkat Kecacatan Bata Beton Ringan Dengan Metode Seven Tools dan FMEA di CV. XYZ - Mojokerto,” J. Kendali Tek. Dan Sains, vol. 1, no. 2, pp. 39–53, 2023.

A. Sofiana and E. Sanggala, “Meminimalisirkan Gagal Antar di Kantor Pos Mojokerto dengan Metode DMAIC,” J. Media Tek. Dan Sist. Ind., vol. 5, no. 1, pp. 1–8, Apr. 2021, doi: 10.35194/jmtsi.v5i1.1209.

I. A. Sidikiyah and K. Muhammad, “ANALISIS DEFECT PADA PROSES PEMBUATAN KAYU LAPIS DENGAN METODE STATISTICAL PROCESS CONTROL (SPC) DAN ROOT CAUSE ANALYSIS,” JUSTI J. Sist. Dan Tek. Ind., vol. 3, no. 2, pp. 267–274, 2022.

Y. Setiawan and M. Fricilia, “Pembuatan Cetakan U-Ditch Pracetak Beton Dalam Mendukung Pembelajaran Praktik,” vol. 2, no. 1, 2023.

I. S. Haq and M. A. Purba, “Kajian Penyebab Kerusakan Door Packing pada Tabung Sterilizer Menggunakan Metode Root Cause Analysis (RCA) di Sungai Kupang Mill,” J. VOKASI Teknol. Ind. JVTI, vol. 2, no. 2, pp. 1–8, Dec. 2020, doi: 10.36870/jvti.v2i2.177.

R. Islamia and S. Asy’ari, “Usulan Penerapan Six Sigma DMAIC Pada Produk Batu Split (Studi Kasus PT.MBP),” J. Manaj., vol. 24, no. 1, pp. 63–72, 2023.

P. Rahmadiani and E. Kusrini, “Operator Performance Analysis Using Overall Labor Effectiveness Method with Root Cause Analysis Approach,” Asian J. Soc. Humanit., vol. 1, no. 11, pp. 918–927, Aug. 2023, doi: 10.59888/ajosh.v1i11.106.

P. B. Sugiharto, Endi Furqon, and Ogie Kustiadi, “ANALISIS PERBAIKAN DEFECT PADA PRODUK BATA RINGAN DENGAN MENGGUNAKAN METODE RCA (ROOT CAUSE ANALYSIS) PADA SALAH SATU PERUSAHAAN BATA RINGAN DI SERANG TIMUR,” J. Taguchi J. Ilm. Tek. Dan Manaj. Ind., vol. 3, no. 1, pp. 157–170, 2023.

S. Terawati and W. Wiguna, “IMPLEMENTASI METODE DMAIC (DEFINE, MEASURE,ANALYZE, IMPROVE, CONTROL) UNTUK MENURUNKAN CACAT BONDING SEPATU DI GEDUNG 2 (DUA) PADA PT. PARKLAND WORLD INDONESIA,” Natl. Conf. Appl. Bus. Educ. Technol. NCABET, vol. 1, no. 1, pp. 431–441, Oct. 2021, doi: 10.46306/ncabet.v1i1.36.

A. Sofiana and E. P. Safitri, “Quality Control Related to Inventory Loss of Animal Feed Raw Materials using I-MR Control Map (Case Study: PT Cargill Indonesia, Plant Semarang),” OPSI, vol. 16, no. 1, p. 35, Jun. 2023, doi: 10.31315/opsi.v16i1.8897.

D.D. Rochman, A.M. Suyono, A. Anwar, and R. Ferdian, Lean dan Six Sigma: Apakah Mereka Sudah Usang di Dunia Industri 4.0, PT. Nas Media Indonesia, 2023.

F. Sumasto, P. Satria, and E. Rusmiati, “Implementasi Pendekatan DMAIC untuk Quality Improvement pada Industri Manufaktur Kereta Api,” J. INTECH Tek. Ind. Univ. Serang Raya, vol. 8, no. 2, pp. 161–170, Nov. 2022, doi: 10.30656/intech.v8i2.4734.

I.S. Sari and W. Sulistiyowati, “Redesign Alat Filter Debu Pada Industri Kecil Menengah (IKM) Dengan Mengintegrasikan Reverse Engineering Dan Root Cause Analisys (RCA),” PROZIMA (Productivity, Optimization, and Manufacturing System), vol. 3, no. 1, pp. 18–25, Jun. 2019.

Wiwik Sulistiyowati and H. C. Wahyuni, Buku Ajar Pengendalian Kualitas Industri Manufaktur Dan Jasa. Umsida Press, 2020. doi: 10.21070/2020/978-623-6833-79-7.

• VIEW ARTICLE

• Regional Competitiveness

Copyright (c) 2025 Risha Siti Aliyah, Inggit Marodiyah

This work is licensed under a Creative Commons Attribution 4.0 International License.