ANALISIS PENGENDALIAN KUALITAS PRODUK KARDUS MENGGUNAKAN METODE SIX SIGMA DI CV. AGZ

Quality control is an activity that is used by companies to monitor and evaluate production activities and ensure that production activities meet production process standards. The purpose of this study is to help companies find out the causes of defects and create suggestions for improvement using the six sigma method. The six sigma method is one of the tools used to control quality. By using several stages, namely define, measure, analyze, improvement, control. From data processing and analysis, the total production is 160,800 pcs and the number of defects is 4303 pcs. Based on the results of the calculation of DPMO found as many as 80,280 per one million productions. Based on the Pareto diagram, the percentage of the most dominant types of defects is the type of paint defects that are not neat, so quality improvements are focused on these types of defects using fishbone diagrams. 

PENGENDALIAN PERSEDIAAN BAHAN BAKU MODEL PROBABILISTIK MENGGUNAKAN SIMULASI MONTE CARLO DAN SISTEM DINAMIS

Increasing efficiency and effectiveness is a fundamental problem for every company. Optimization of raw material inventory is an effort for this problem. PT XYZ is a company engaged in manufacturing various flavors of beverages, one of which is sugar. The level of sugar usage in each month is probabilistic and dynamic. PT XYZ's raw material inventory is determined based on field assumptions, causing a shortage or excess of raw material inventory. This study aims to determine the policy of raw material inventory P backorder model with the integration of Monte Carlo simulation and Dynamic System. The raw material inventory policy is determined based on the order time interval, safety stock, and maximum capacity and compares the actual total inventory cost with the Monte Carlo simulation. Dynamic system simulation is carried out to ensure that the P backorder model inventory policy can be applied. The results showed that the total inventory without Monte Carlo was better than the total cost of the Monte Carlo simulation of Rp198.846.582,98 with an order time interval of 0,30929 years, a maximum inventory capacity of 11149,8 kg and a safety stock of 4335,83 kg. From the results of the comparison using the one sample T-test, it was found that there was no statistical difference between the results of the dynamic system simulation and the results from the calculation of the P backorder model so that the P backorder model policy could be applied to PT XYZ to determine the minimum inventory cost

ANALISIS KINERJA TURBIN ULIR PEMBANGKIT LISTRIK TENAGA MIKROHIDRO DENGAN VARIASI SUDUT KEMIRINGAN POROS

The screw turbine ( Archimede Screw ) is one type of turbine used in the Micro Hydro Power Plant (PLTMH) system. Archimedes Screw used to be used by humans as a water pump to make it easier to take water from rivers, but over time now the use of Archimedes Screw has turned into a water turbine. Archimedes Screw has the advantage that it is environmentally friendly because it does not interfere with the water ecosystem, has a low head and the resulting efficiency is also quite high. Factors that affect the performance of screw turbines are tilt angle, water head , water flow and bladescrew turbine. The purpose of this research is to find out what is the best slope angle to produce the highest power and efficiency to be applied to Hydroelectric Power Plants (PLTA). Variations in the tilt angle of the screw turbine shaft used in this study were 32º, 37º, 42º and 47º with a blade diameter of 0.35 m, a blade distance of 0.29 m and a blade length of 0.87 m, with a water flow rate of 0.013 m 3 /s. . From the results of this study, the maximum average rotation of the turbine shaft is 194.66 RPM and the generator rotation is 621.33 RPM, the generator power is 36,42 Watt and the highest efficiency is 37,5% at an angle of 47º

ANALISIS KINERJA PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO TURBIN WHIRLPOOL DENGAN MENGGUNAKAN 6 SUDU

Tujuan dari penelitian ini adalah:1.    Menganalisis kinerja Pembangkit Listrik Tenaga Mikro Hidro Turbin Whirlpool dengan 6 sudu2.  Menganalisis daya Listrik yang dihasilkan kan oleh Pembangkit Listrik Tenaga Mikro Hidro ( PLTMH)3.  Melakukan Uji Normalitas untuk mengatahui apakah data yang di peroleh dalam lima percobaan terdistribusi normal atau tida

PEMBUATAN PEMBANGKIT LISTRIK TENAGA MIKROHIDRO TURBIN ULIR SKALA LABORATORIUM

River flow is one of the renewable energy sources that can be used for micro hydro power plant "screw Archimedes". Archimedes screw turbine design and manufacture is being developed for micro hydro power generation. Archimedes screw turbines can be operated at low heads. In Indonesia, especially the province of North Sumatra, it has great potential considering the large number of streams in the mountains or hills so that the surrounding community will later be able to take advantage of the relatively small currents of the existing rivers, when applied to river flows that have a relative height of 0.5 meters to 1 meter even though on the water that flows a little wavy, the screw turbine can of course be used, that is the advantage of the PLTMH tool. The geometry of the screw turbine is determined by external parameters, namely the outer radius, turbine length and laying slope and internal parameters, namely the radius in the number of blades.External parameters are usually determined by head and discharge. The purpose of this research is the manufacture of a laboratory-scale screw turbine micro-hydro power plant, producing a screw turbine installation for experimental studies of laboratory-scale micro-hydro power plants. Furthermore, this installation will be used for tests on external parameters and internal parameters of the Archimedes screw turbine. The result of the design and manufacture of a screw turbine on a laboratory scale is a screw turbine model made using angled iron material and an iron plate with a geometric shape of two blades, the number of turns is 6, the turbine length is 870 mm with a blade distance of 290 mm

ANALISIS PENGARUH DEBIT AIR TERHADAP KINERJA PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH) MENGGUNAKAN 4 BUAH SUDU

Micro hydro power plant (PLTMH), is a small-scale power plant that uses hydropower as its driving force, such as irrigation canals, rivers or natural waterfalls by utilizing the head and the amount of water discharge. The purpose of this study was to determine how the effect of water discharge on the performance of a whirlpool turbine type micro hydro power plant and how much power was produced by a whirlpool turbine type micro hydro power plant. The process in this study was carried out by analyzing the performance of a micro hydro power plant consisting of tube volume, water discharge, water power, turbine power generator power, torque and turbine efficiency. The results of this study are the best potential for water discharge produced by a micro hydro power plant of the whirlpool turbine type prototype is in the third experiment with a discharge of 0.00625 m³/s with a turbine power of 0.54 Watt and a power generated by a generator 10, 53 Watts. The efficiency of the whirlpool turbine prototype micro hydro power plant was also obtained in the third experiment with a turbine efficiency value of 3.8%. Micro hydro power plants are very influential on the height of the fall of water into the turbine, the higher the fall of water, the greater the power generated

ANALISIS KOMPOSISI KOMPOSIT POLIPROPILEN/KARBON AKTIF TERHADAP KEKUATAN BENDING UNTUK APLIKASI PLAT DWIKUTUP FUEL CELL

Carbon-based material is one of the main filler materials for the manufacture of polymer composite bipolar plates for fuel cell applications. Some variation materials filler based carbon used on manufacture bipolar plate white high cost.  Determine of low cost filler materials is one of special issue for manufacture bipolar plate. Activated carbon is a alternative for suitable filler material base carbon at polymer composite and easy to find in Indonesia. This study investigates the effect of activated carbon composition in polymer composites on bending strength with a composition of 10, 20, 30, 40 (percent by weight) activated carbon (AC) with a polypropylene (PP) matrix. The sample has fabricated used hot press mouding with mix process at 220o­­­ C temperatures with 320 Psi pressure in 20 minutes. The bending test results with the standard three point bending test ASTM D790-03, The best value was found at a composition of 10% by weight of activated carbon of 26.9 MPa. This achievement has been obtained the Department of Energy, United State Of America (DOE USA) standard is 25 Mpa. This condition due to the polymer's composition of 10% KA to 90% PP, which makes it easier for the polymer to yield higher bonding and hence boost bending strength

SIMULASI ALIRAN AIR TURBIN ULIR PEMBANGKIT LISTRIK MIKROHIDRO DENGAN VARIASI DEBIT MENGGUNAKAN SOFTWARE SOLIDWORKS

Electrical energy is energy that has an important role for society. One of the benefits of electrical energy is for lighting. The need for electricity in the world today is very large. The source of energy used to obtain electricity is still mostly using oil and gas and coal, where oil and gas on earth is very limited, and at some point it is estimated that it will run out. With this problem, one of the renewable power plants that can be utilized is the MHP system (Microhydro Power Plant). MHP is a small-scale hydroelectric power plant by utilizing water from irrigation canals, dams, and rivers that have low head. The utilization of this power can be done by converting it into mechanical energy using a screw turbine type water turbine (Screw Archimedes) with a discharge of 0.01 m³/s, a length of 870 mm, a thread diameter of 350 mm, a shaft diameter of 190 mm with a shaft thickness of 5 mm, 6 blades which divided into 2 threads and a shaft tilt angle of 35°. This research was conducted to simulate the performance of a screw turbine using solidworks software. This study serves to obtain critical points due to fluid pressure on the screw turbine and to analyze the water fluid when the screw turbine is operated

ESTIMASI WAKTU PROSES PEMBUBUTAN HARD PLAIN RUBBER ROLL MENGGUNAKAN METODE REGRESI LINIER

Persaingan di dunia industri saat ini menuntut para produsen untuk bersaing dalam memberikan kualitas produk yang baik dengan waktu produksi yang singkat serta biaya produksi yang relatif murah. Hal tersebut berkaitan dengan mesin produksi yang memiliki peran penting untuk menghasilkan produk dengan kualitas baik. PT. Voith Paper Rolls Indonesia merupakan perusahaan jasa dan manufaktur yang bergerak dibidang perbaikan roll dan pembuatan material roll cover. Salah satu proses produksi yang dilakukan pada saat perbaikan roll yaitu proses pembubutan yang dilakukan sebanyak dua kali. Pada proses pembubutan sering kali terdapat perbedaan waktu yang signifikan antara waktu aktual dengan estimasi waktu yang didapatkan dari formulasi eksisting. Oleh karena itu laporan ini akan berfokus pada upaya perbaikan formulasi perhitungan untuk estimasi waktu proses pembubutan di mesin bubut A pada hard plain rubber roll dengan menganalisis pengaruh luas permukaan terhadap waktu proses menggunakan metode regresi linier sederhana melalui aplikasi IBM SPSS

ANALISIS PENGARUH DEBIT AIR TERHADAP KINERJA PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH)

Electricity is one of the sources of energy used by humans which is produced through a power generation system. Electricity providers in Indonesia are still not evenly distributed, even in remote areas, there are still many that have not been reached by electricity. With this problem, one of the renewable power plants that can be utilized is the PLTMH system (Microhydro Power Plant). The greater the discharge of water, the greater the power generated by the turbine but with a shorter time. Vice versa if the water discharge that comes out is less then the power generated by the turbine is getting smaller but with a long time. The results show a whirlpool turbine using 6 blades with a water volume of 58 L and a sluice gate opening 7 cm produces a water discharge of 0.00625 m3/s with Water Power 14.10 Watt, , Generator Power 11.12, Torque 0.0077N.m, Turbine Power 0.72 Watt and Efficiency 5.1%