Judul: An Aggregate Production Planning Model with Goal Programming Approach for A Wooden Door Industry in PT C
Abstrak: Penelitian ini bertujuan untuk mengembangkan model matematika menggunakan program tepat sasaran sebagai alat yang menghasilkan solusi optimal pada masalah perencanaan produksi agregat di industri pintu kayu, PT C. Model yang dikenalkan dilakukan untuk memecahkan masalah perencanaan produksi agregat di industri pintu kayu yang memproduksi pintu dalam lingkungan manufaktur MTO. Kompleksitas penelitian ini meliputi variabilitas antara kapasitas produksi dan permintaan pelanggan agar dapat meminimalkan tingkat backorder. Selain itu, perusahaan memiliki multiproduk dengan multi-proses, sehingga model harus mengontrol waktu kerja dan tenaga kerja ke tingkat minimum. Beberapa variabel dalam model yang merupakan jumlah bilang bulat, menyebabkan algoritma branch and bound dipilih sebagai metode untuk menjalankan model. Hasil perhitungan dalam model menunjukkan produksi optimum, yang akan mendukung perusahaan untuk mengelola produksi dalam waktu yang teratur dan lembur, buruh kontrak dan tingkat subkontraktor, dan unit backorder. Kata kunci: perencanaan produksi agregat, program tepat sasaran, multi-produk,
Keyword: aggregate production planning, goal programming, multi-product, branch and bound algorithm, Mathematical model, APP, Wooden door industry, Business process model notation, Forecasting technique, Production process

Judul: An Aggregate Production Planning Model With Dynamic Programming Approach for Palm Oil Industry
Abstrak: A common challenge in fulfilling the demand of the raw material requirement is a continuous and repetitive work in a CPO based industry. Main type of operations and procurement in this work lead to how to identify factors that affect the Aggregate Production Planning (APP) system in a CPO based industry. The objectives of this work including how to construct the forecasting model of raw material supply and demands, and to develop an aggregate production planning model in CPO based industry with a dynamic programming approach, and eventually to optimize the total production cost and increase the profit. Parameters of the production process in the APP system consists of working time, productivity, production capacity, inventory level, inventory capacity, subcontract and cost parameters. The forecasted demand of CPO was computed by Additive Decomposition. The forecasted supply of raw material was computed by Multiplicative Decomposition Method. The model showed that the total minimum cost of the CPO production for a year is around Rp 126 Billion. The result of DP showed a potential forecasted profit in the next year.
Keyword: aggregate production planning, forecasting, dynamic programming

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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