Continuous review approach to control materials inventory : a case study

Syalina, Dhini (2013) Continuous review approach to control materials inventory : a case study. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam sistem pemeliharaan ketersediaan material menentukan tingkat pelayanan. Untuk PT ABC Duri Riau itu juga mempengaruhi kemampuan mereka untuk memasok listrik dan uap untuk pelanggan yang lebih besar. Sayangnya perusahaan ini memiliki banyak persediaan material yang permintaannya begitu lambat dead stock dan persediaan yang berlebih serta memiliki Perputaran Ratio yang rendah TOR. Sistem pergudangan saat ini diminta untuk ditinjau. Oleh karena itu penelitian ini bertujuan untuk melakukan optimasi dengan meminimalkan kelebihan persediaan material sehingga nilai persediaan bisa optimal dan mencapai tingkat layanan yang ditargetkan. Penelitian ini menggunakan metode yang disebut pendekatan model persediaan continuous review control s S dimana s adalah titik pemesanan ulang dan S adalah stock maksimal. Material diklasifikasikan berdasarkan karakteristik permintaan mereka. Simulasi dilakukan dengan peningkatan dan penurunan nilai Z. Hasil simulasi harus sesuai dengan target service level yang paling optimal berikut total biayanya. Hasil simulasi menunjukkan bahwa nilai s S yang diperoleh dari rumus tidak selalu memberikan tingkat layanan terbaik dan biaya total. Dengan peningkatan atau penurunan dalam nilai nilai Z diinput dalam interval tertentu kombinasi terbaik dari s dan S dapat meningkatkan tingkat layanan dan atau total biaya. Singkatnya dari 5 lima material yang dianalisis varians rata-rata antara s S rumus dan s S simulasi mampu mengurangi bahan biaya total sebesar 36. Tingkat layanan material telah sedikit berkurang sebesar 004 namun masih melebihi tingkat layanan perusahaan yaitu 95. ================================================================================================= In the maintenance system the availability of materials determined the service level. For PT ABC Duri Riau it was also affected their ability to supply electricity and steam for bigger customer. Unfortunately this company held so many slow moving dead stock and surplus items in the inventory and had the low Turnover Ratio TOR. Current warehouse system was required to be reviewed. Therefore this research aimed to do that by minimized the materials excess in inventory thus optimize inventory value and achieved the targeted service level. This study employed a method called continuous review s S inventory control model where s was the reorder point and S was the maximum stock. Materials were classified based on their characteristic of demand. Simulation was performed by increasing and decreasing the Z value. The simulation result should comply with the service level target which optimizes the total cost. The simulation result indicated that the value of sS obtained from the formula did not always provided the best service level and total cost. With the increased or decreased in the value of Z value inputted within a certain interval the best combination of s and S were improved service levels and or total cost. In summary from 5 five materials analyzed the average variance between s S formula and the s S simulation were able to reduced materials total cost by 3.6. The materials service level has been reduced slightly by 0.04 but still exceed the company service level of 95.

Item Type: Thesis (Masters)
Additional Information: RTMT 658.787 Sya c
Uncontrolled Keywords: material; inventory control; continuous review
Subjects: H Social Sciences > HD Industries. Land use. Labor > HD55 Inventory control
Divisions: 61101-Magister Management Technology
Depositing User: Yeni Anita Gonti
Date Deposited: 24 Feb 2020 02:39
Last Modified: 24 Feb 2020 02:39
URI: http://repository.its.ac.id/id/eprint/75127

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