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Optimizing the performance of hydraulic testing processes for remanufactured torque flow products using a lean manufacturing approach at pt. xyz

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Oleh : Shalsabila Putri Yeri

Info Katalog

Penerbit : FTI - Usakti

Kota Terbit : Jakarta

Tahun Terbit : 2024

Pembimbing 1 : Docki Saraswati

Pembimbing 2 : Debbie Kemala Sari

Kata Kunci : Lean Manufacturing, Value Stream Mapping, Process Activity Mapping, Waste, Fishbone Diagram

Status Posting : Published

Status : Lengkap


File Repositori
No. Nama File Hal. Link
1. 2024_SK_STI_063002000077_Halaman-Judul.pdf
2. 2024_SK_STI_063002000077_Surat-Pernyataan-Revisi-Terakhir.pdf 1
3. 2024_SK_STI_063002000077_Surat-Hasil-Similaritas.pdf 1
4. 2024_SK_STI_063002000077_Halaman-Pernyataan-Persetujuan-Publikasi-Tugas-Akhir-untuk-Kepentingan-Akademis.pdf 1
5. 2024_SK_STI_063002000077_Lembar-Pengesahan.pdf 1
6. 2024_SK_STI_063002000077_Pernyataan-Orisinalitas.pdf 1
7. 2024_SK_STI_063002000077_Formulir-Persetujuan-Publikasi-Karya-Ilmiah.pdf 1
8. 2024_SK_STI_063002000077_Bab-1-Pendahuluan.pdf 9
9. 2024_SK_STI_063002000077_Bab-2-Landasan-Teori.pdf
10. 2024_SK_STI_063002000077_Bab-3-Metodologi-Penelitian.pdf
11. 2024_SK_STI_063002000077_Bab-4-Analisis-dan-Pembahasan.pdf
12. 2024_SK_STI_063002000077_Bab-5-Kesimpulan-dan-Saran.pdf
13. 2024_SK_STI_063002000077_Daftar-Pustaka.pdf
14. 2024_SK_STI_063002000077_Lampiran.pdf

P PT. XYZ adalah sebuah perusahaan yang terlibat dalam sektor remanufaktur komponen alat berat. Produk remanufaktur PT. XYZ merupakan komponen dari alat berat seperti dump truck, ekskavator, dan lainya. Terdapat beberapa aktivitas yang harus dilalui oleh komponen remanufaktur salah satunya ialah proses performance testing. Proses ini sangatlah penting dikarenakan bertujuan untuk mengetahui kondisi optimal dari produk hasil remanufaktur, pada proses ini akan dinilai apakah hasil remanufaktur sesuai dengan kapasitas komponen baru atau tidak. Pada beberapa proses performance test yang dilakukan di PT. XYZ, berdasarkan Current State Value Stream Mapping (CVSM) teridentifikasi adanya waste of motion dan waste of unutilized talent saat hydraulic performance test menggunakan mesin Hydraulic Test Benches pada produk remanufaktur Torque Flow (TF). Terjadinya waste disebabkan karena terdapat banyak pilihan tipe produk TF, yang di mana setiap tipe produk menggunakan jig dan instalasi yang berbeda. Sehingga, operator perlu melakukan aktivitas pergantian jig secara berulang. Permasalahan lainnya adalah terdapat ketidakefektifan gerak operator saat pengambilan sampel testing serta sering terjadinya kelalaian pada pencatatan hasil test. Penelitian ini bertujuan untuk memberikan usulan perbaikan melalui pendekatan Lean Manufacturing untuk meningkatkan performasi pada proses tersebut. Indikator peningkatan performansi berdasarkan efisiensi proses dengan meminimasi waste serta lead time. Penggunaan pendekatan Lean Manufacturing bertujuan untuk mengurangi pemborosan yang terjadi. Pertama, dilakukan pemetaan menggunakan salah satu tools Lean Manufacturing yaitu CVSM pada TF Hydraulic Test dan didapatkan nilai Process Cycle Efficiency (PCE) sebesar 86%. Selanjutnya, dilakukan pemetaan dengan Process Activity Mapping (PAM) di mana diidentifikasi beberapa sequence proses yang termasuk dalam kategori pemborosan. Pertama, pada sequence setting stand & handling, ditemukan pemborosan berupa waste of motion pada aktivitas value added (VA) operation. Selanjutnya, pada sequence proses running (warm up), ditemukan dua pemborosan berupa waste of motion pada aktivitas non-value added (NVA) dan necessary non-value added (NNVA), serta waste of unutilized talent pada aktivitas NNVA. Terakhir, pada sequence disconnect product & handling, ditemukan pemborosan berupa waste of motion pada aktivitas VA. Setelah pemborosan teridentifikasi, Fishbone Diagram dan analisis 5W1H digunakan untuk mengetahui akar masalah agar usulan perbaikan yang dihasilkan tepat sasaran. Usulan perbaikan meliputi re-design jig trunnion dan pengadaan control box untuk mengatasi waste of motion, serta pengadaan check sheet untuk mengeliminasi waste of unutilized talent. Setelah penerapan usulan perbaikan, didapat bahwa jumlah pemborosan berkurang dari 6 aktivitas menjadi 0 aktivitas, nilai PCE meningkat sebesar 8% dari 86% menjadi 94%, dan lead time Torque Flow Hydraulic Test berkurang dari 495,3 menit menjadi 415,9 menit.

P PT. XYZ is a company engaged in the remanufacturing sector for heavy equipment components. The remanufactured products of PT. XYZ include components for heavy equipment such as dump trucks, excavators, and others. Several activities must be undertaken for these remanufactured components, one of which is the performance testing process. This process is crucial as it aims to determine the optimal condition of the remanufactured products, assessing whether they meet the capacity of new components. In some performance tests conducted at PT. XYZ, based on Current State Value Stream Mapping (CVSM), waste of motion and waste of unutilized talent were identified during the hydraulic performance test using Hydraulic Test Benches on remanufactured Torque Flow (TF) products. The occurrence of waste is due to the variety of TF product types, each requiring different jigs and installations, necessitating repeated jig changes by the operator. Other issues include ineffective operator movements during sample collection and frequent errors in recording test results. This study aims to provide improvement proposals using a Lean Manufacturing approach to enhance performance in this process. Performance improvement indicators are based on process efficiency by minimizing waste and lead time. The Lean Manufacturing approach aims to reduce existing waste. First, mapping was conducted using one of the Lean Manufacturing tools, CVSM, for the TF Hydraulic Test, resulting in a Process Cycle Efficiency (PCE) of 86%. Next, mapping was done using Process Activity Mapping (PAM), where several process sequences were identified as waste. First, in the setting stand & handling sequence, waste of motion was found in value added (VA) operation activities. Next, in the running (warm-up) process sequence, two types of waste were identified: waste of motion in non-value added (NVA) and necessary non-value added (NNVA) operations, and waste of unutilized talent in NNVA operations. Finally, in the disconnect product & handling sequence, waste of motion was found in VA operation activities. After identifying the waste, a Fishbone Diagram and 5W1H analysis were used to determine the root causes to ensure the proposed improvements are well-targeted. Improvement proposals include redesigning the jig trunnion and implementing a control box to address waste of motion, and introducing a check sheet to eliminate waste of unutilized talent. After implementing the proposed improvements, the amount of waste decreased from 6 activities to 0 activities, the PCE value increased by 8% from 86% to 94%, and the lead time for the Torque Flow Hydraulic Test reduced from 495.3 minutes to 415.9 minutes.

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