Analisis Persediaan Material Dengan Metode Material Requirement Planning (MRP) Pada Pekerjaan Struktur Atas Lantai 2 dan Lantai 3 Proyek Rumah Sakit Umum Daerah R.Syamsudin Sukabumi

Analysis Of Material Inventory With Material Requirement Planning (MRP) Method On Structural Works On The 2nd And 3rd Floor Of R.Syamsudin Regional General Hospital Project

Pengendalian persediaan merupakan suatu langkah kebijakan yang harus ditekuni guna kelancaran proses produksi dalam suatu pelaksanaan konstruksi. Seiring berjalannya suatu pelaksanaan, tak jarang pula ditemukan kendala terkait ketersediaan material, seperti halnya kekurangan stok material maupun kelebihan stok yang mengakibatkan melambungnya alokasi anggaran biaya penyimpanan. Sebaliknya, kekosongan material akan berbanding sejajar terhadap proyeksi kemajuan pelaksanaan. Dengan demikian, sudah sewajarnya suatu perencanaan mengelola persediaan material. Tujuan penelitian ini yakni menentukan teknik lot sizing yang mampu mengeluarkan total biaya persediaan minimum. Mengenai metode yang digunakan untuk meraih tujuan penelitian antara lain bertajuk Material Requirement Planning (MRP) dengan menerapkan tiga teknik lot sizing bernama Lot for Lot (LFL), Economic Order Quantity (EOQ) serta Period Order Quantity (POQ). Berdasarkan analisa perhitungan, pada penghujung penelitian membuktikan bahwasanya teknik Lot for Lot (LFL) menjadi teknik lot sizing yang mengeluarkan anggaran biaya persediaan paling kecil. Teknik LFL merupakan metode yang menghasilkan total biaya persediaan minimum dengan nominal Rp. 974.573.245,20. Sedangkan, teknik EOQ menjadi metode paling konsumtif dengan biaya Rp. 1.490.151.936,86. Teknik terakhir yakni POQ menjadi opsi lain untuk penerapan total biaya persediaan paling ekonomis dengan rincian harga Rp. 975.645.531,21.

Kata Kunci: Persediaan Material, MRP, Lot Sizing.

Inventory control is a policy step that must be pursued in order to smooth the production process in a construction implementation. As the implementation progresses, it’s not uncommon problems to be found related to the availability of materials, such as a shortage of material stock and excess stock which results in soaring budget allocations for carrying costs. On the other hand, material vacancy will be proportional to the projected progress of implementation. Thus, it’s such a must for make plan to manage material inventories. The aim of this research is to determine the lot sizing technique that is able to issue a minimum total cost inventory. Regarding the method used to achieve the research objectives, among others entitled as Material Requirement Planning (MRP) by applying three techniques of lot sizing namely, Lot for Lot (LFL), Economic Order Quantity (EOQ) and Period Order Quantity (POQ). Based on the calculation analysis, at the end of the study represent that the Lot for Lot (LFL) technique was a technique lot sizing that issued as the smallest inventory cost budget. The LFL technique is a method that produces a minimum total cost inventory within value of Rp. 974.573.245,20. Meanwhile, the EOQ technique is the most consumptive method that costs Rp. 1.490.151.936,86. The last technique namely POQ, is another option for implementing the most economical total cost inventory with a detailed price of Rp.975.645.531,21.

Keywords: Materials Inventory, MRP, Lot Sizing.