Judul: Improvement of Factory Layout and Design of Chitin Production SOP in CV. Bio Chitosan Indonesia
Abstrak: CV. Bio Chitosan Indonesia merupakan perusahaan yang berfokus di bidang pengolahan cangkang hewan laut dengan memproduksi kitin dan kitosan yang berkualitas. Pabrik ini baru berdiri dan masih memerlukan perbaikan dan evaluasi dari sistem kerjanya, khususnya tata letak pabrik yang belum teratur, sehingga menimbulkan adanya backtracking, tidak adanya SOP (Standard Operating Procedure) yang terstandar serta lingkungan kerja yang cukup berbahaya. Penelitian ini bertujuan untuk memperbaiki tata letak area kerja dan fasilitas pabrik yang dapat meningkatkan efisiensi pergerakan aliran material, serta merancang SOP produksi kitin. Perbaikan tata letak dilakukan mengikuti metode SLP (Systematic Layout Planning) dengan software BLOCPLAN90. SOP dirancang melalui diskusi, observasi, dan studi literatur. Perbaikan tata letak yang dilakukan menghasilkan total jarak yang lebih pendek dari tata letak awal dengan peningkatan efisiensi pergerakan material sebesar 32,97%. Beberapa perbaikan tata letak fasilitas direkomendasikan pada 9 area kerja. SOP dirancang dalam bentuk diagram alir dengan memperhatikan titik kritis dan pengendalian potensi bahaya di setiap tahapan proses, sehingga SOP yang dirancang memperhatikan kualitas mutu produk dan keselamatan kerja pekerja., CV. Bio Chitosan Indonesia is a company focused on processing shells of marine animals by producing quality chitin and chitosan. This factory is just established and still requires improvement and evaluation of its work system, especially the irregular factory layout which resulted in backtracking, the absence of standardized SOPs (Standard Operating Procedures), and a fairly dangerous work environment. This research aims to improve the layout of workspace and factory facilities that can increase the efficiency of material flow movement and design SOPs for chitin production. Layout improvements are done with the SLP (Systematic Layout Planning) method using BLOCPLAN90 software. SOPs are made through discussion, observation, and literature study. The layout improvements resulted in a shorter total distance than the initial layout with an increase in material movement efficiency by 32,97%. Some improvements to the layout of the facility were recommended in the 9 workspaces. SOPs were designed in the form of flowcharts by paying attention to critical points and controlling potential hazards at each stage of the process so that designed SOPs have paid attention to product quality and the safety of workers.
Keyword: chitin, layout, SOP, workspace

Judul: Production Facility Layout Design at PT Sutan Vet Medika
Abstrak: PT Sutan Vet Medika merupakan industri pakan hewan yang memproduksi suplemen penambah nafsu makan kucing dan anjing. Terdapat beberapa permasalahan pada tata letak fasilitas produksi yaitu penempatan pintu toilet yang belum sesuai dengan pedoman CPOHB, penempatan tata letak fasilitas produksi belum memperhatikan aliran bahan sehingga terdapat aliran bahan yang backtracking, dan penggunaan area ruangan fasilitas produksi yang digunakan sebagai tempat tinggal karyawan. Proyek desain utama ini bertujuan untuk merancang alternatif tata letak fasilitas produksi untuk memperbaiki permasalahan dari tata letak sebelumnya. Perancangan perbaikan tata letak fasilitas produksi dilakukan dengan metode SLP (Systematic Layout Planning) dan algoritma CORELAP (Computerized Layout Planning). Tata letak usulan fasilitas produksi menghasilkan peningkatan efisiensi jarak perpindahan material sebesar 23,67% berdasarkan hasil simulasi., PT Sutan Vet Medika is an animal feed industry that produces supplements to increase the appetite of cats and dogs. There are several issues with the production facilities layout, including the improper placement of the restroom door according to the Good Animal Drug Manufacturing Practice (GADMP) guidelines, the production facilities layout that have not paid attention to the material flow as it creates material backtracking, and the use of production facilities space for employees’ residences. This research aims to design alternative production facilities layouts to address the issues of the previous layout. The improvement of the production facilities layout is carried out using the Systematic Layout Planning (SLP) method and the CORELAP (Computerized Layout Planning) algorithm. The layout of proposed production facilities increase 23.67% material transfer distance efficiency based on simulation results.
Keyword: CORELAP, CPOHB, Efficiency, Layout design

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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