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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis JISI UMJ (Jurnal Integrasi Sistem Industri UMJ) Martabe : Jurnal Pengabdian Kepada Masyarakat JURNAL PENDIDIKAN TAMBUSAI PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Optimalisasi Asatiza: Jurnal Pendidikan Reswara: Jurnal Pengabdian Kepada Masyarakat Jurnal Bisnis, Manajemen, dan Ekonomi Jurnal Ilmu Sosial, Manajemen, Akuntansi dan Bisnis JENIUS: Jurnal Terapan Teknik Industri Khalifa: Journal of Islamic Education Jurnal ARTI : Aplikasi Rancangan Teknik Industri Jurnal Bisnis dan Manajemen (JURBISMAN) Jurnal Polimesin Jurnal Industri Samudra Jurnal Ekonomi Islam, Akuntansi, dan Manajemen
Yusnawati, Yusnawati
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Journal : jurnal optimalisasi

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Rancangan Aliran Proses dalam Upaya Meminimumkan Proses Non-Value Added melalui Value Stream Mapping pada UD Usaha Rezeki Prabot Nurmalawati, Nurmalawati; Dewiyana, Dewiyana; Yusnawati, Yusnawati; Pramanda, Ryan; Rahman, Muhammad Abdul; Muzakir, Muzakir
Jurnal Optimalisasi Vol 11, No 2 (2025): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i2.12620

Abstract

The flow of process is a sequence of jobs or activities performed in producing goods and services. UD. Usaha Rezeki Prabot, a small-to-medium enterprise (SME) in furniture manufacturing, consistently faces a critical operational challenge: despite stable customer demand (853 units/year of panel door type 7), only 750 units (88%) are delivered on time, resulting in a 12% delay rate. This gap is not caused by insufficient labor or machinery, but by a fragmented production system riddled with non-value-added (NVA) activities particularly repetitive machine setup, excessive material handling, redundant measurements, and long waiting times that inflate lead time to 176.91 minutes per unit. Value Stream Mapping (VSM) is applied as a lean tool to visualize the entire material and information flow, identify dominant wastes (waiting, over-processing, and unnecessary motion), and redesign the workflow. Through the implementation of future-state mapping by grouping components with identical profiles into batch processing and eliminating redundant inspections the NVA time was reduced from 79.95 minutes (45.19%) to 16.07 minutes (15.93%), cutting total lead time by 43%. This study demonstrates that for SMEs like UD. Usaha Rezeki Prabot, sustainable productivity gains come not from capital investment, but from restructuring workflow based on frontline insights to eliminate systemic waste embedded in daily routines. The purpose of this mapping is to identify all types of waste along the Value Stream and to take a move in an attempt to eliminate the waste. The flow of process design with Value Stream Mapping approach enables the company to be able to minimize the non value added activities and to shorten the time taken in the process of making doors and to increase the productivity. The purpose of this Motion and Time study was to do a direct observation about time and movement of someone who is working. UD Rezki Prabot uses the VSM (Value Stream Mapping) to minimize the non value added process and to propose a design to improve the flow of process. The result of this study showed that the time of non value added activities decreased from 176.91 minutes to 100.9 minutes. The non value added activities decreased from 45.19% to 15.93% due to the decrease of non value added activities by sequencing the work activities that the machine does not need to be set up repeatedly.
Pengaruh Beban Kerja Mental Terhadap Kinerja Kurir Menggunakan Metode NASA-TLX Maulana, Riza Anta; Nurmalawati, Nurmalawati; Zeki, Muhammad; Yusnawati, Yusnawati; Nadya, Yusri; Dewiyana, Dewiyana; Muzakir, Muzakir
Jurnal Optimalisasi Vol 12, No 1 (2026): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v12i1.13368

Abstract

PT. Global Jet Express (J&T Express) operates as a last-mile delivery logistics provider serving the delivery of documents and commercial packages in the Langsa City area, Aceh. Initial findings from in-depth interviews revealed that couriers frequently experience symptoms of mental fatigue, such as prolonged lethargy, mild dizziness, musculoskeletal pain, and a decrease in intrinsic motivation, particularly at the end of their shifts. This study aims to analyze the influence of mental workload on the operational performance of couriers, while simultaneously measuring workload levels using the NASA-TLX (National Aeronautics and Space Administration Task Load Index) instrument, which has been tested for validity and reliability in the context of cognitive-physical load assessment. Although subjective, this method allows for relative quantification and comparison between individuals across six dimensions of work pressure: Mental Demand, Physical Demand, Temporal Demand, Performance, Effort, and Frustration. Pearson correlation results showed a coefficient of r = -0.212 (p < 0.05), indicating a weak but statistically significant negative relationship between the average Weighted Workload (WWL) scores and delivery performance (number of packages per day). These findings reinforce the hypothesis that increased mental pressure contributes to a decline in operational efficiency, though it is not proportionally dominant. The distribution of NASA-TLX scores showed a dominance in the "High" category (24 couriers, 50–79) and two cases in the "Very High" category (81.33 and 82.67), with no couriers falling into the "Moderate" or "Low" categories.This confirms that mental workload is a systemic issue within daily operations rather than a mere individual variation.
Co-Authors ., Malahayati Agus Syahputra, Agus Amalia, Sastika Anasrudin, Anasrudin Andriani, Meri Aznah Nurwanah Basyith, Abdul Darmin Darmin, Darmin Dewiyana, Dewiyana Eka Suryani, Novya Erwandi, Muhammad Dwi Restu Keliat Fadilah, Nahdah Fahriana, Nina Febriani, Suci Ramadhanti Fitriyansah, Aidil Hamid , Abdul Handayani, Nurlaila Hardiyansyah Hardiyansyah Ilham, M Indra, Fauzan Indra, Meidian Khairani, Yelli Khatami, Muhammad Leony, Leony Mardila, Mardila Markoilpiyanto, Markoilpiyanto Masthura, Lely Maulana, Riza Anta Merri Yelliza Muhammad Thaib Hasan Muhammad Zeki Muslimah Muslimah Muslimah Muzakir Nadeak, Rebecca Charin Spanic Nadya, Yusri Nanda, Novianda Nanda Nugraha, Aidil Rizky Nurmalawati, Nurmalawati Pahlepi, Asran Pramanda, Ryan Rahman, Muhammad Abdul Revanza, Bayu Rio Julfika Sabardi, Wiky Safutri, Janniarni Toha Sari, Leni Putma Susilawati Ningsih Suyono, Lili Taufan Arif Adlie Tegar Iswara, Dito Tri Wintolo Apoko Ulil Amna, Ulil Wahyuningsih, Puji Yanimansyah, Yanimansyah Yolanda, Rico Yusri Nadya Zeki, M.Zeki Zeki, Muhammad