Judul: Kinerja Penyampaian Suku Cadang  PT Toyota-Astra Motor Dengan Model  Supply Chain Operations Reference
Abstrak: Kegiatan memenuhi permintaan pelanggan melibatkan banyak pihak yang kegiatannya harus bersinergi, sehingga perusahaan perlu menerapkan konsep Supply Chain Management (SCM). Kinerja SCM perlu dijaga dengan melakukan evaluasi kinerja SCM secara periodik. Penelitian ini menganalisis proses penyampaian suku cadang asli Toyota pada rantai pasok di PT Toyota-Astra Motor (TAM) dengan model Supply Chain Operations Reference (SCOR). Tujuan penelitian ini mengidentifikasi model rantai pasok suku cadang yang diterapkan PT TAM dan menganalisis kinerja penyampaian suku cadang PT TAM dengan model SCOR. Data yang digunakan dalam penelitian ini adalah data primer dan sekunder. Data primer diperoleh dari wawancara, survei, arsip data order dan waktu pengiriman milik perusahaan. Data sekunder diperoleh dari dokumen milik perusahaan. Analisis menggunakan model SCOR yang meliputi tiga level proses. Perhitungan metrik kinerja level 1 SCOR diolah dengan aplikasi program Microsoft Excel. Anggota rantai pasok suku cadang PT TAM yaitu Supplier (mata rantai 1), PT TAM (mata rantai 2) sebagai agen tunggal pemegang merk Toyota, Main Dealer Toyota (mata rantai 3), Sub Dealer/Branch/VSP dan Partshop (mata rantai 4) yang secara langsung melayani End-User yaitu pemilik kendaraan Toyota (mata rantai 5). SCOR Level 1 mendefinisikan lima proses inti SCOR (plan, source, make, deliver, dan return) pada setiap rantai pasok PT TAM yang menjadi ruang lingkup bagi setiap elemen rantai pasok dalam perolehan bahan baku, aktifitas kegiatan, maupun mengenai aliran informasi sehingga seluruh elemen rantai pasok memperoleh nilai tambah dari aktifitas-aktifitas yang dilakukan. Berdasarkan pengukuran dengan metrik kinerja level 1 SCOR, kinerja PT TAM dalam menyampaikan order dengan tepat waktu (delivery performance) sangat baik (diatas 90%), lead time pemenuhan order tipe 3 untuk P. Sumatera =6-7 hari, P. Jawa=1-3 hari, P. Sulawesi=10-16 hari dan P. Irian=25-28 hari, dan supply chain response time yang dibutuhkan PT TAM adalah nol hari. SCOR Level 2 menghubungkan antara proses SCOR dengan tipe proses (planning, execution and enable) sehingga perusahaan dapat menentukan kategori proses yang paling cocok dengan bentuk rantai pasoknya. Kategori proses yang sangat kritis untuk PT TAM adalah kategori proses Deliver Stocked Product (D1). SCOR Level 3 menampilkan aliran kerja dan informasi kategori proses D1 pada PT TAM yang kemudian diuraikan menjadi rincian tugas pada Level 4 sehingga dapat menjadi acuan bagi pelaksana/praktisi. Berdasarkan analisis model SCOR, SCM suku cadang PT TAM telah memiliki kinerja yang sangat baik karena telah menerapkan strategi yang tepat terutama dalam hal pemilihan supplier dan pihak ekspedisi yang mengirimkan barang ke pelanggan dengan tepat waktu.
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Judul: Pengukuran Kinerja Manajemen Rantai Pasokan dengan Pendekatan SCOR Model 9.0 (Studi Kasus di PT Indocement Tunggal Prakarsa Tbk)
Abstrak: Cement is a basic requirement in building construction and development as critical to the nation. Cement demand growth continues to increase every year. Based on data Indonesian Cement Association (ASI), cement sales continue to improve. July 2009, domestic cement sales year on year growth 2.8% and August 2009, cement sales grew 7.5% than the same period of year 2008. This made the justification that the cement industry should always be to increase production to meet domestic and foreign. Improving the competitiveness of firms in the form of effectiveness and efficiency of productivity has become one of the most important thing, quality products and services is also a major factor affecting customer satisfaction and corporate survival. Therefore, PT Indocement Tunggal Prakarsa Tbk (PT ITP Tbk) is one of the largest cement companies in Indonesia carry out the integration of supply chain activities of companies. The objectives of this research were (1) Assess the supply chain structure of cement products in PT ITP Tbk; (2) Conduct performance measurement of supply chain management for cement products in PT ITP Tbk approach SCOR model version 9.0; (3) Provide alternatives solution to the problem after the measurement is known along with suggestions of measurement and analysis activities of supply chain management at PT ITP Tbk. The primary data obtained by direct observation in the field and through direct interviews with relevant parties. While the secondary data obtained through the performance benchmark Supply Chain Management (SCM) report from APQC ( American Productivity and Quality Center), company documents, search the libraries that support research activities and internet sites. The analysis in this study using the method of SCOR Model version 9.0 from level 1 to level 3, then the results of performance metrics compared to the value of performance metrics globally similar companies from the APQC data. Calculation of performance metrics level 1 is the perfect order fulfillment (POF) 82.43%, order fulfillment cycle time (OFCT) 2 days, the cost of good sold (COGS) 53.84% and cash-to-cash cycle time (CTCCT) 53 days. Opportunity value that is calculated using the lost opportunity measure (LOM) is a POF registration COGS Rp 552,146,310,636 and Rp 127,956,658,590. The mapping level 2 shows PT ITP Tbk have performance lowest deliver process, because the expedition and transportation of cement is less effective and efficient in sending customer orders. Mapping level 3 shows in detail the process of delivering PT ITP Tbk, so it can answer why deliver a low performance. From the results of the overall SCM performance PT ITP Tbk good enough, but needs to be improved on the expedition and the distribution of transportation to reach the target business objectives set PT ITP Tbk, which is improving customer service and increase profits.
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Judul: The Exploration of Discrete Logarithm over Finite Field GF(3m)
Abstrak: The security of many public~key algorithms is based on the problem of finding discrete logarithms. The generalized discrete logarithm problem is the following: given a finite cyclic group G of order n, a generator a of G, and an element fl E G, find the integer x, 0 ~ x ~ n - 1, such that 0: = fl. Algorithm for discrete logarithm problem focused on Menezes et al. (1997) that consist of exhaustive search algorithm, the baby-step giant-step algorithm, Pollard's rho algorithm, Pohlig-Hellman algorithm, and index-calculus algorithm. These algorithms are explorated to be used in discrete logarithm problem over finite field GF(3m ). The exploration also produces some algorithms, i.e. naif negative algorithm, baby-step mother-step algorithm, baby-step mother free-step algorithm, and baby-step free-step algorithm. All algorithms implemented using Maple 11. The Pohlig-Hellman and baby-step giant-step algorithms are efficient enough to be used in discrete logarithm problem over finite field GF(3m ) for m < 20.
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