An improvement of supplier-manufacture inventory system integrated with stochastic periodic review modeling for SMEs in Indonesia
Economic Annals-XXI: Volume 198, Issue (7-8), Pages: 24-33
Citation information:
Dewa, P. K., Patanduk, Y., & Jumintono (2022). An improvement of supplier-manufacture inventory system integrated with stochastic periodic review modeling for SMEs in Indonesia. Economic Annals-XXI, 198(7-8), 24-33. doi: https://doi.org/10.21003/ea.V198-03
Parama Kartika Dewa
MA (Economics),
Department of Industrial Engineering,
Atma Jaya University (Universitas Atma Jaya Yogyakarta)
Yogyakarta, 12930, Indonesia (Corresponding author)
paramakartikadewa@gmail.com
ORCID ID: https://orcid.org/0000-0001-5177-2439
Yuharningsih Patanduk
MA (Economics),
Department of Industrial Engineering,
Atma Jaya University (Universitas Atma Jaya Yogyakarta)
Yogyakarta, 12930, Indonesia
yuharningsi@gmail.com
ORCID ID: https://orcid.org/0000-0002-8114-5513
Jumintono
MA (Economics),
Faculty of Technical and Vocational Education,
University Tun Hussein Onn Malaysia
Johor, 86400, Malaysia
masmintosragen@gmail.com
ORCID ID: https://orcid.org/0000-0002-7591-649X
An improvement of supplier-manufacture inventory system integrated with stochastic periodic review modeling for SMEs in Indonesia
Abstract. SME LCR is one of the handicrafts SME in Yogyakarta, Indonesia. This SME produces several handicraft products such as storage baskets with various variants, and furniture. The process of ordering raw materials for SMEs is carried out when there is a demand for incoming products with the order quantity based on the raw material needs in meeting product demand. This study intends to provide recommendations for improving raw material governance to overcome demand fluctuations during the lead time and reduce the total cost of supply chain inventory by implementing an integrated inventory system. To meet the study aim, the EOQ Probabilistic P system (Period Review Method) is utilized. The P inventory model is distinguished into two models namely model P with backorder and model P with lost sales. Next, the Purchase Cost (Ob) and Procurement Costs are applied to the P model. The research method comprises through 3 stages: the pre-field stage, field stage, and the advanced stage (laboratory analysis, data analysis, and reporting). Given the results regarding banana and mendong raw materials supply, it can be observed that for banana raw materials, the reorder time interval that can generate the minimum total inventory cost for banana raw materials is 0.1470 years or 53 days with a total cost of IDR 263,721,081.72. Moreover, it is seen that the suggested model generates the minimum total cost of supply chain inventory compared to the SME policy and the individual model, which justifies the economic feasibility of this model.
Keywords: Inventory System; Supplier; Manufacture; Sales; Supply Chain; Craft Business; Handicraft; Banana Raw Materials; Mendong Raw Materials
JEL Classіfіcatіon: O18; O12; O14
Acknowledgements and Funding: The authors would like to thank Universitas Atma Jaya Yogyakarta and the parties involved to complete this research.
Contribution: The authors contributed equally to this work.
Data Availability Statement: All data will be available upon request.
DOI: https://doi.org/10.21003/ea.V198-03
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https://doi.org/10.25165/j.ijabe.20191202.2834
Received 10.04.2022
Received in revised form 14.05.2022
Accepted 26.05.2022
Available online 20.08.2022