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All Journal PROZIMA (Productivity, Optimization and Manufacturing System Engineering) Journal Of World Science Journal Research of Social Science, Economics, and Management
Niniet Indah Arvitrida
Institut Teknologi Sepuluh Nopember
Computer Science & IT Economics, Econometrics & Finance Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Social Sciences

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Supplier Selection For Technical Labor Procurement Using Fuzzy Analytical Hierarchy Process Approach In The Power Company Hari Asman; Niniet Indah Arvitrida; Suparno
PROZIMA (Productivity, Optimization and Manufacturing System Engineering) Vol. 10 No. 1 (2026): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/prozima.v10i1.1785

Abstract

Effective procurement and supplier selection processes are needed to create a low-cost and reliable supply chain. A power company is having difficulty determining a supplier of technical personnel because there was no scientific method used to weight and prioritize supplier assessment criteria. So far, decision-making has been done more subjectively, causing a mismatch between the result of supplier selection and the company’s needs. This study uses a supplier selection model with the Fuzzy Analytical Hierarchy Process (FAHP) method to calculate the weight of each criterion and sub-criterion and determine the best supplier. The criteria used in this study include Financial Capability, Performance, Similar Experience, Expert Personnel, Office at Work Location, Similar Contracts, and Price, based on the company regulations. The result of this study shows the weight of each criterion that is: Financial Capability at 0.2007, Similar Experience at 0.1887, Performance at 0.1744, Price at 0.1545, Expert Personnel at 0.1518, Office at Work Location at 0.0877, and Similar Contracts at 0.042. Evaluation of three supplier alternatives indicates that supplier X obtained the highest preference value (0.9263), followed by supplier Y (0.8448) and supplier Z (0.8338). Sensitivity analysis on bid price changes demonstrates that supplier Z is more sensitive to price reductions than supplier Y, but supplier X remains the best alternative. Overall, FAHP effectively supports objective and comprehensive supplier selection decision-making. The proposed model can improve consistency, transparency, and procurement accountability.
Decision Analysis of the Use of Ex-Termination Materials for Operating Cost Efficiency with a Multi-Criteria Approach in an Indonesian Upstream Oil and Gas Company Tri Haryanto; Niniet Indah Arvitrida
Journal of World Science Vol. 4 No. 3 (2025): Journal of World Science
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jws.v4i3.1374

Abstract

This study aims to develop a more effective and data-based strategy for the management of ex-termination materials in the upstream oil and gas industry, integrating ABC, VED, and FMSD methods with Analytical Hierarchy Process (AHP). The analysis was carried out by integrating the ABC-FMSD-VED matrix approach. The results showed that 21% of category A materials accounted for 80% of the total inventory value, while 85.95% of materials were included in the Deadstock category, which was not optimally utilized. The AHP analysis showed that the top priority was internal utilization, followed by borrowing, transfer, and deletion, with sensitivity tests indicating decision stability.
Transmission Spare Parts Inventory Management Strategy Based on Poisson Demand Estimation and Inter-Warehouse Coordination Through Risk Pooling Bima Dwi Utomo; Niniet Indah Arvitrida
Journal Research of Social Science, Economics, and Management Vol. 6 No. 1 (2026): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v6i1.1661

Abstract

Spare parts inventory management, particularly for slow-moving transmission components, presents a significant challenge for utility companies due to unpredictable and infrequent demand patterns, high asset value, and the need to maintain operational reliability. Excessive inventory levels tie up substantial working capital, increase carrying costs, and elevate the risk of obsolescence, whereas insufficient stock availability may result in equipment downtime and service disruptions. This study aimed to optimize inventory management for slow-moving transmission spare parts by balancing operational reliability and inventory cost efficiency over a ten-year planning horizon. A Poisson-based forecasting approach, using equipment failure rates as the primary demand driver, was implemented. Additionally, three risk-pooling schemes (no risk pooling, full risk pooling, and partial risk pooling) were evaluated through simulation to assess fill rates, disruption response, and inventory holding costs. The Poisson-based approach reduced projected spare parts requirements by 36% and lowered ending inventory levels by 55% compared with the existing policy. The simulation results indicated that while no risk pooling provided higher fill rates and full risk pooling minimized holding costs, partial risk pooling achieved the optimal trade-off across key performance metrics. Implementing a Poisson-based demand model combined with partial risk pooling enables organizations to significantly reduce procurement expenditures and inventory holding costs without compromising operational reliability.
Performance Evaluation of the Supply Chain for Investment-Based Electricity Connection Services using SCOR, IPA, and RCA Aam Amrullah; Niniet Indah Arvitrida
Journal Research of Social Science, Economics, and Management Vol. 6 No. 1 (2026): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v6i1.1707

Abstract

This research evaluated the supply chain performance of new electricity connections and capacity upgrades requiring network investment at PLN UP3 Sanggau. The observed problems included project completion delays, application backlogs, deferred connected capacity, and unrealized energy sales. Performance was assessed using a questionnaire completed by 35 respondents directly involved in the process, covering 17 indicators across six SCOR processes: Plan, Source, Make, Deliver, Return, and Enable. The data were analyzed through validity and reliability tests, gap analysis, Importance-Performance Analysis (IPA), in-depth interviews, and 5M+1E-based Root Cause Analysis (RCA). The overall performance score was 3.659, while the importance score was 4.528. Source recorded the lowest performance score (3.10) and the largest gap value (1.45). IPA identified three main priority areas: critical material availability (SRC2), procurement process timeliness (SRC1), and timely and complete material distribution to work sites (DLV3). RCA indicated inadequate inventory control, long replenishment lead times, dependence on external suppliers, limited transportation capacity, and insufficient distribution visibility. Operational evidence showed that 29.17% of project feasibility plans were delayed, 481 applications exceeded 40 working days, 4,773,300 VA of capacity remained deferred, and the estimated opportunity loss reached 32,458 kWh per day. The proposed improvements emphasized critical material control, procurement monitoring, pre-dispatch completeness verification, and end-to-end material visibility. The SCOR–IPA–RCA integration provided a concise diagnostic framework for evaluating project-based utility services.
Co-Authors Aam Amrullah Bima Dwi Utomo Hari Asman Suparno Tri Haryanto