Judul: Pemeliharaan pencegahan dan persediaan suku cadang untuk peralatan produksi di pabrik pengolahan kelapa sawit kertajaya
Abstrak: Plant maintenance undertaken at PKS Kertajaya is a system breakdown maintenance and preventive maintenance. Preventive maintenance is not carried out when the fresh fruit bunches processed a lot, so there will be breakdown maintenance. PKS Kertajaya does not have its own inventory concept in determining the amount of spare parts inventory. Reservation made based on estimates only based on the demand that has happened. The purpose of this study is to formulate the scheduling preventive maintenance on production equipment maintenance scheduling in a palm oil mill with an optimal cost of maintenance, to determine spare parts inventory by the number of low demand. This study conducted to get performance of production equipment maintenance using Overall Equipment Effectiveness, identifying and prioritizing equipment factory production by using Failure Mode and Effect Analysis, schedule preventive maintenance of production equipment with a total cost of optimal maintenance and spares inventory planning using the model of Economic order Quantity where demand assumed poisson distribution. Results of performance of equipment maintenance using Overall Equipment Effectiveness indicates that maintenance scheduled at a palm oil mill. Results of the Failure Mode and Effect Analysis is the ranking value Risk Priority Number to 30 components scheduled. Results of factory production equipment maintenance scheduling of oil palm is scheduling maintenance for 30 components with optimal charge at 51% level of reliability and can save as much as 17,5% of the cost without doing preventive maintenance. Results of spare parts planning is optimal total inventory cost.
Keyword: breakdown maintenance, scheduling, maintenance, planning, inventory, total cost

Judul: Factory Equipment and Layout Design of Miniplant Scale Palm Oil Mill
Abstrak: Pabrik Kelapa Sawit (PKS) di Indonesia umumnya memiliki kapasitas produksi yang besar dan menerapkan standar buah yang tidak bisa sepenuhnya dipenuhi oleh petani swadaya. Selain itu, PKS besar memiliki letak yang jauh dari perkebunan milik petani swadaya sehingga memerlukan tambahan biaya distribusi. Salah satu solusi yang dapat dilakukan untuk menyelesaikan permasalah tersebut adalah dengan mendirikan pabrik kelapa sawit skala miniplant. Penelitian ini bertujuan menentukan pemilihan peralatan yang dibutuhkan oleh miniplant sawit dan membuat desain peralatan serta tata letak pabrik. Penelitian ini dilakukan dengan pendekatan desain fungsional dan struktural yang terdiri dari observasi, wawancara, studi literatur, analisis data, gambar teknik peralatan, serta membuat rancangan tata letak pabrik. Miniplant sawit menggunakan 14 jenis peralatan yang terdiri dari jembatan timbang, loading ramp, conveyor, vertical sterilizer, thresher, digester, screw press, ripple mill, nut and fiber separator, vibrating screen, vertical clarifier tank, vacuum dryer, tangki berpengaduk, dan storage tank. Desain peralatan yang dibuat telah disesuaikan sesuai dengan kapasitas produksi masing-masing alat. Luas keseluruhan yang dibutuhkan untuk proses produksi pada miniplant sawit adalah sebesar 902 m2., Palm oil mills in Indonesia generally have large production capacities and apply their own fruit standards that cannot be reached by independent farmers. Large palm oil mills are usually located far from farms owned by independent farmes, thus requiring additional distribution costs. One solution that can be done to overcome these probelms is to build miniplant scale palm oil mill. This research purpose is to determine the selection of equipment needed by palm oil miniplant and to design equipment along with factory layouts. This research was conducted with a functional and structural design that consisted of observations, interviews, literature studies, technical drawings of factory equipment, and making factory layout design. Palm oil miniplant use 14 types of equipment consisting of a weighbridge, loading ramp, conveyor, vertical sterilizer, thresher, digester, screw press, ripple mill, nut and fiber separator, vibrating screen, vertical clarifier tank, vacuum dryer, stirred tank, and storage tank. Factory equipment design has been adjusted to the production capacity of each piece of equipment. The total area required for the production process of the palm oil minipant is 902 m2.
Keyword: equipment design, factory layout, palm oil mills

Judul: Embriogenesis ikan buta (Astyanax fasciatus)
Abstrak: Ikan buta Astyanax fasciatus adalah spesies ikan unik dari famili Characidae yang menempati perairan dalam gua di Wilayah La Cueva Chica-San Luis Potasi-Mexico. Ikan ini memiliki mata yang tereduksi (Blind Cavefish) dan warna kulit merah muda, pucat serta mengkilap.
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