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All Journal Outline Journal of Economic Studies
Nasution, Gita Andhara
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Economics, Econometrics & Finance Social Sciences

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Optimization of Weekday Inventory Allocation Based on Sales Targets at the Indomaret Point Rest Area at KM 65 B Using a Constraint Coefficient Matrix and Linear Programming Simanjuntak, Loranty Folia; Siregar, Felysha Putri Saulina; Sinaga, Rut Yosepina; Nasution, Gita Andhara; Tarigan, Wajra Ceyna Cakti
Outline Journal of Economic Studies Vol. 5 No. 2: April - September 2026
Publisher : Outline Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61730/zcrmtn27

Abstract

Purpose: This study aims to formulate an optimal inventory allocation strategy for weekdays at Indomaret Point Rest Area KM 65 B in order to improve profitability and achieve sales targets more effectively amid capital and shelf-capacity constraints. Methods: The analysis focuses on identifying the optimal combination of products based on contribution margins, capital availability, and storage limitations. Results: The findings reveal that inventory optimization is achieved by prioritizing product x9, which provides the highest contribution margin of Rp3,212 per unit, along with product x1 to maintain stable daily sales volume. The proposed optimization model recommends stocking a total of 434 units with a required capital investment of Rp1,376,733. The model also demonstrates the ability to reduce the risk of dead stock while improving Sales Per Day (SPD) target achievement. Conclusions: The implementation of Linear Programming through the Simplex method can support more efficient inventory management and enhance profitability in modern retail operations. The optimization model provides a practical basis for improving logistics and stock allocation decisions. Originality/value: This study contributes by applying a mathematical optimization approach to inventory allocation in a modern retail context, particularly in minimizing dead stock risk and maximizing sales performance under operational constraints.
Co-Authors Loranty Folia Simanjuntak Sinaga, Rut Yosepina Siregar, Felysha Putri Saulina Tarigan, Wajra Ceyna Cakti