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Auto2000 ZZZ memiliki salah satu sarana untuk pelanggan yaitu appointment atau yang sering disebut dengan booking service. Booking service merupakan salah satu sarana yang memudahkan pelanggan melakukan servis sehingga pelanggan tidak perlu antri dan dapat diprioritaskan. Booking service juga membuat aktivitas bengkel menjadi lebih tertata karena kebutuhan pelanggan dapat dipersiapkan terlebih dahulu. Namun ternyata booking rate di bengkel Auto2000 ZZZ belum mencapai target Key Performance Indicator (KPI) yaitu hanya 48% artinya pelanggan yang walk in lebih banyak dari pada pelanggan yang booking sehingga penulis melakukan survei kepada pelanggan walk in dan ternyata 59% diantaranya disebabkan oleh ketidaktahuan mengenai tata cara booking. Berdasarkan hal tersebut penulis berencana mengoptimalkan booking rate melalui platform yang mudah dijangkau oleh masyarakat luas yaitu Instagram dan WhatsApp. Penulis melakukan analisa menggunakan metode fishbone guna mendapatkan akar penyebab, maka dibuatlah akses booking melalui Instagram dan mengoptimalkan reminder service pelanggan melalui WhatsApp dengan menambah agent reminder service dan membuat aplikasi monitoring hasil reminder. Dengan adanya improvement tersebut booking rate naik sebesar 12% yaitu menjadi 60% yang artinya sudah melewati target KPI. Kata Kunci : Akses booking melalui Instagram, Reminder Service, Aplikasi Monitoring

The growth of motor vehicles over the past five years has reached 8.63 % per year. The increasing number of vehicles has an impact on increasing fuel consumption. One alternative energy as another fuel currently being developed in motor vehicles is bioethanol. The addition of bioethanol will certainly change the fuel properties, the fuel will be more difficult to self-ignite so the pressure generated in the combustion chamber will be more consistent. The coefficient of variation (COV) represents the ratio of the standard deviation to the mean of a set of data, in this study in-cylinder pressure data (IMEP) is used. Based on previous research that discussed the analysis of emission gas and fuel consumption on SI engine fueled with low-grade bioethanol and oxygenated additive, the authors examined further to analyze the characteristic of gasoline-ethanol blend and oxygenated additive to COVIMEP and exhaust gas emissions of the various fuel mixture at variable engine speed were investigated. The results of the study show that gasoline-ethanol blend and oxygenated additive decrease variation in combustion pressure. It also reduces exhaust emissions; CO and HC are found to be reduced while CO_2 and O_2 increased as concentration increases.

PT. XYZ menyediakan layanan perbaikan kategori general repair bagi pelanggannya. Pada layanan ini, terdapat kendala yaitu lead time proses servis berkala eksternal (SBE) tidak mencapai target, khususnya pada proses penggantian oli mesin Fortuner. Proses ini dirasa masih kurang efektif karena teknisi kerap harus membersihkan cross member dan lower cover, serta lantai stall karena ada tetesan oli ketika proses penggantian oli dilakukan, hal ini yang menyebabkan waktu servis menjadi lebih lama. Dalam mencari solusi atas permasalahan yang terjadi, penulis menggunakan tools fishbone diagram untuk membuat improvement mempercepat penggantian oli mesin Fortuner dengan membuat service special tools (SST) berupa penampang oli mesin sehingga memudahkan teknisi melakukan penggantian oli mesin. Hasil dari improvement tersebut mempercepat lead time proses SBE dari 1 jam 2 menit 59 detik menjadi 54 menit 39 detik.

Lead time total process service berkala (SBE) kelipatan 40.000 km pada penggantian oli transmisi manual dan oli differential memerlukan waktu yang relatif lebih lama. Jenis service khususnya kendaraan penggerak belakang ini tercatat yang cukup banyak (hampir 45%) dari keseluruhan service di Auto 2000 cabang ABC pada periode waktu tertentu (rata-rata 3 bulanan). Masalah yang cukup menonjol pada proses penggantian oli transmisi manual dan oli differential tersebut ada pada alat yang digunakannya yang menyebabkan prosesnya kurang efisien, seperti lamanya pengisian oli ke dispenser oli karena harus diisi satu persatu, lamanya pengisian tekanan udara karena alat yang digunakan masih menggunakan tekanan udara untuk mendorong oli yang ada di tabung dispenser oli. Apabila tekanan udara yang diisi kurang, pengisian oli ke transmisi dan differential menjadi lama. Proses penggantian oli ini membutuhkan waktu 18 menit 3 detik. Dengan menggunakan fishbone tools untuk mengatasi masalah tersebut, penulis membuat improvement berupa special service tools (SST) yaitu berupa pompa oli tipe impeller dengan modifikasi penambahan valve, dengan sumber tegangan battery 12 V. Setelah adanya SST, proses menjadi lebih sederhana di mana teknisi tidak perlu lagi mengisi oli satu persatu dan tidak perlu mengisi tekanan udara. Proses penggantian oli transmisi manual dan oli differential menjadi lebih cepat yaitu 10 menit 44 detik atau meningkat 11%, sedangkan safetynya juga meningkat kurang lebih 13%.

Proses perawatan kendaraan servis berkala ekternal (SBE) di bengkel Auto 2000 XXX yang merupakan bengkel yang memiliki customer yang cukup banyak, seharusnya sudah dilakukan sesuai dengan standard operation procedure (SOP), kecuali khususnya yang berkaitan dengan mengangkat beban berat seperti roda. Masalah yang terjadi dalam proses pemasangan roda adalah karena banyaknya pelanggan bengkel pengguna roda besar, sehingga teknisi harus memasang roda dengan prosedur tambahan seperti menaikkan atau menurunkan lift, memantul-mantulkan roda dan lainnya. Hal ini menambah lamanya waktu dan juga berbahaya bagi teknisi karena beratnya roda yang melebihi standar (> 20 kg). Untuk mengatasi masalah tersebut dilakukan penelitian dengan membuat Special Service Tool (SST) untuk mempercepat proses pemasangannya. Fokus dari perbaikan adalah mempercepat proses pemasangan roda menggunakan SST Little Helper. Efisiensi waktu meningkat sebesar 41%. Tingkat keamanan proses pemasangan roda meningkat dari sebelumnya 24% menjadi 80%. Tingkat kemudahan juga meningkat dari sebelumnya 62% menjadi 66%. Kata Kunci : Lead time, Safety, Pemasangan roda, SST

Bengkel Auto 2000 XXX merupakan bengkel yang memiliki customer yang cukup banyak khususnya yang memiliki kendaraan Toyota bermesin NR, tetapi alat bantu penunjang perbaikannya ada yang masih sangat minim. Hal ini menyebabkan waktu pengerjaan proses penggantian v-belt membutuhkan waktu yang lama. Masalah yang terjadi dalam proses penggantian v-belt adalah konstruksi mesin memiliki celah yang sempit dan panas yang ditimbulkan dari mesin. Akibatnya, proses penggantian v-belt yang dilakukan oleh teknisi membutuhkan waktu yang cukup lama yaitu 57 menit 04 detik. Untuk mengatasi masalah tersebut dilakukan penelitian dengan membuat Special Service Tool (SST) untuk mempercepat proses perngerjaan. Prinsip kerjanya dengan menghilangkan proses pelepasan dan pemasangan under cover dan crankshaft position sensor (CPS). Perbaikan dengan fokus mempercepat proses penggantian v-belt menggunakan SST sesuai target yaitu 20 menit. Dalam proses penggantian v-belt hanya membutuhkan 19 menit 43 detik lebih cepat dari waktu sebelum dilakukan perbaikan, 100% lebih mudah setelah dilakukan perbaikan yang sebelumnya hanya 6,25 % mudah, dan 100% safe setelah dilakukan perbaikan karena telah dilengkapi pelindung tangan dalam prosesnya. Kata Kunci : Lead time, V-belt, Mesin tipe NR, SST

Currently, the main energy source is heavily dependent on fossil energy. The current transportation technology also uses fossil-derived energy sources to make vehicle engines are ignited. Also, the electricity that is currently enjoyed by billions of people resulted enormously from the use of fossil energy. Limitations of existing fossil energy sources and the issue of global warming have led many to expand on renewable energy and energy conservation to maintain energy availability. One of an alternative energy source that is currently being developed is the use of bioethanol as a mixture or replacement of fossil fuel. The use of bioethanol (C 2 H 5 OH) as a substitute for a mixture of fossil fuels affects the efficiency of the engine produced by fuel. This study examines the effect of a mixture of bioethanol gasoline (RON 80) on a single-cylinder spark ignition (SI) 125 cc engine that is carried out with variations in fuel mixtures (E0, E5, E10, and E15) with the addition of 0.5 vol % oxygenated cyclohexanol and this experimental test is carried out as much as 800 cycles for each fuel mixture, with throttle opening, maintained 100 %, and variations in engine speed at 4,000 rpm up to 8,500 rpm with engine speed increases every 500 rpm. Engine performance is measured by connecting a machine with a dynamometer, and the variation of cylinder pressure combustion is measured by a pressure transducer. The test results are expected to prove that the mixture of fuel with oxygenated cyclohexanol can reduce COV IMEP in the cycle to cycle variations (E10++ which is 4.24 %), so that torque fluctuations do not occur which results in reliable engine performance or vehicle driveability increase, besides that the performance of both power and torque becomes better

The final energy consumption of Indonesia's fuel oil continues to increase every year for the past ten years. In general, most of energy consumption is obtained by fossil-fuels such as oil, gas, coal, and geothermal and the rest is renewable energy. This condition indicates that Indonesia is relying on non-renewable energy sources yet, whereas the numbers are running low. To overcome it, other energy needs to be developed to replace oil fuels that are renewable, eco-friendly, and natural. One potential renewable energy source developed in Indonesia instead of fuel is bio-ethanol (C2H5OH), which is mixed with gasoline (E5, E10, and E15); further the octane value of fuel can be increased. In addition to the problems in the comparison of the two fuel mixtures, the properties of each different substance are resulted in the difficulty of mixing both types of fuel that can produce a high Coefficient of Variation which results in the performance of the gasoline engine and cause torque fluctuations (vehicle driveability problem) produced. Addition of oxygenated additives (0.5 vol %) is intended, so that an insignificant COV value will be produced (less than 10%) in the two mixtures, whereby it can enhance performance and emissions.

To facilitate the activities of Indonesians, government issues many public transportations, furthermore a lot of Indonesians uses their own private vehicle as well. Unfortunately, all of these transportations still utilize fossil fuel as energy sources. And with the increasing number of populations, the number of transportations also rises. This condition shows that Indonesia is still dependent on non-renewable energy sources. One alternative energy currently being developed as an alternative fuel in motorized vehicles is bioethanol. The addition of bioethanol to gasoline will certainly change the fuel properties, the fuel will be more difficult to self-ignite so the pressure generated in the combustion chamber will be more consistent. Coefficient of variation (COV) represent the ratio of the standard deviation to the mean of a set of data, in this study in cylinder pressure data (IMEP) is used. Based on previous research that discussed the analysis of emission gas and fuel consumption on SI engine fueled with low-grade bioethanol and oxygenated additive, the authors examined further to analyze the characteristic of ethanol blend and oxygenated additive to COVIMEP and Specific Fuel Consumption (SFC) of various fuel mixture as well as COVIMEP correlation with SFC at variable engine speed were investigated. The result of study shows that ethanol blend and oxygenated additives in gasoline decrease variation in combustion pressure occurrences, lower COV. Ethanol – gasoline blend increased SFC compared with pure gasoline, while ethanol – gasoline blend with additive slightly reduce SFC compared with their own respective mixture.

One of the main factors that cause the earth that we live in is not as clean as it was before is the utilization of fossil fuel. Motorized vehicles still utilize fossil fuel as energy sources, and the number of motorized vehicles is growing every year. Biomass energy are one of the alternative energies currently being developed. Bioethanol are one of the technologies for fuel in motorized vehicles to utilize biomass as an alternative energy. The addition of bioethanol to gasoline will certainly change the fuel properties, the fuel will be more difficult to self-ignite so the pressure generated in the combustion chamber will be more consistent. Coefficient of variation (COV) represent the ratio of the standard deviation to the mean of a set of data, in this study in cylinder pressure data (IMEP) is used. Based on previous research that discussed the analysis of emission gas and fuel consumption on SI engine fueled with low-grade bioethanol and oxygenated additive, the authors examined further to analyze the characteristic of ethanol blend and oxygenated additive to COVIMEP and Heat Release Rate (HRR) of various fuel mixture as well as COVIMEP correlation with HRR at variable engine speed were investigated. The result show that compared with pure gasoline, ethanol blend decreases HRR. When oxygenated additive added to gasoline – ethanol blend, it increases its maximum heat release rate especially on fuel mixture E5 about 6.2% compared to E0. And the Correlation of COV and HRR; as COV value increases, HRR decreases. Whereas, when COV value decreases, HRR increases.

Utilization Currently, bioethanol has developed into additional fuel or substitute fuel for motorcars as a renewable energy source. Although Indonesia has great potential for developing bioethanol, its utilization continues to be very low. In certain areas in Indonesia, bioethanol is produced on a tiny low scale grade (hydrous) and is barely used as a drink; therefore research and development of the utilization of bioethanol in motorcars are needed, where the grade must be higher (anhydrous). Hydrous bioethanol has slightly different characteristics compared to anhydrous bioethanol. Octane is lower, heating value is lower, the heat energy of vaporization is higher, and the oxygen content is higher. However, the precise values for every characteristic rely on the mixture content and therefore the water content contained so a separate test of the hydrous bioethanol is required. This study could be a study of the utilization of hydrous bioethanol produced from low-grade bioethanol which is converted to high- grade bioethanol through a distillation process using motorcycle exhaust gas as a heat source which is applied to a compact-distillation system consisting of an evaporator, separator, and condenser to distil low-grade bioethanol (around 30%) becomes high-grade bioethanol (> 90%). Followed by testing the utilization of anhydrous bioethanol mixed with gasoline in SI gasoline engines, the composition of the mixture E0, E5, E10, and E15 and therefore the composition of the mixture with the addition of oxygenated additives (cyclohexanol) as secondary alcohols to further improve performance and reduce gas emissions throw it away.

Utilization of renewable energy in Indonesia is still low, compared to 34% oil, 20% coal and 20% gas, utilization of energy sources for water 3%, geothermal 1%, 2% biofuels, and biomass 20%. Whereas renewable energy sources dwindling due to the increasing consumption of gasoline as a fuel. It makes us have to look for alternative renewable energy, one of which is bio ethanol. Several studies on the use of ethanol was done to the researchers. Our studies using low grade bio ethanol which begins with the disitillation independently utilize flue gas heat at compact distillator, produces high grade bio ethanol and ready to be mixed with gasoline. Stages of our study is the compact distillator design of the motor dynamic continued with good performance and emission testing and ethanol distilled. Some improvement is made is through the flue gas heat control mechanism in compact distillator using gate valve, at low, medium, and high speed engine. Compact distillator used is kind of a batch distillation column. C...

The use of alternative energy source is expected to reduce fossil energy consumption and exhaust emissions. One of the non-fossil energy alternatives introduced for vehicles is bioethanol, it can produce in a simple way and cheap. Low-grade bioethanol has characteristics that depend on exhaust emissions generated. Low-grade bioethanol can be used as a substitute or mixture of fuel. The mixture of bioethanol and gasoline gives an effect to the increase of octane number and reduces the emission of CO2 produces. To get a more optimum effect on fuel consumption and emission, the oxygenated additive can be added to the fuel mixture. In this study, the effect of fuel consumption and emission was carried out by comparison of E5, E10, E15 without additive and with additive oxygenated cycloheptanol. The test will be performed by the method of calculating the amount of fuel consumption against the time to get specific fuel consumption. Emission test will be performed in single cylinder spark-ignition (SI) engine 150cc premix fuel with 100% opening throttle position connected to the gas analyzer in variation speed engine to see the emission gas. This study aims to obtain reduce the emission gas (CO2 and CO) and fuel consumption with the addition of the oxygenated additive.

Limited fossil energy resources need to encourage renewable energy development and energy conservation it is called green energy development. One of the alternative energy sources used are bioethanol, from low grade is converted into high grade through distillation process with distillator compact that will be used as a mixture of gasoline. Tests compact distillator consisting of evaporator Indonesia Kampus, separator, and condenser by utilizing exhaust gas to heat distillator already filled with low grade bioethanol, so the heat transfer occurs on the surface of the exhaust into the evaporator chamber. In the evaporator will transform ethanol into the vapor phase. Ethanol vapor flows into the separator, with a mechanism in it is expected that water vapor will evaporate participate separately with ethanol vapor. Ethanol vapors from this distillation will flow to the condenser and will be turned into liquid, the liquid is as high grade bioethanol would be the fuel mixing gasoline. In early studies, distillation rate was 98.5 ml/h with 67% ethanol content. Optimization compact distillator is done by adding the valve at the evaporator branch. When heat has reached 80°C exhaust gas flow to the evaporator chamber is closed. As a result, the heat from the evaporator can be detained and not rise significantly. Further optimization is to change the design of the separator through theoretical and empirical calculations with some assumptions based on the rule of thumb in the field of distillation, adding insulation to reduce heat leakage, as well as varying the feed volume and feed concentrate ethanol. In the end, based on the parameters of the distillation rate and ethanol concentrate, compact distillator with distances between tray 100 mm, volume 800 ml, engine speed 5.400 rpm can produce distillation rate of 274.3 ml/hr and ethanol concentrate of 88.97%.

Bioethanol is currently used as an alternative fuel for gasoline substitute (fossil fuel) because it can reduce the dependence on fossil fuel and also emissions produced by fossil fuel which are CO 2 , HO, NOx. Bioethanol is usually used as a fuel mixed with gasoline with certain comparison. In Indonesia, the usage is still rare. Bioethanol that is commonly used is bioethanol anhydrous 99.5%. In the previous studies, bioethanol was distilled from low to high grade to produce ethanol anhydrous. But the result is only able to reach 95% or ethanol hydrous. This study is objected to design a simple mechanism in the mixing of bioethanol hydrous with the gasoline using a fuel mixer mechanism. By this mechanism, the fuel consumption and the resulting emissions from combustion engine can be analyzed. The fuel blend composition is prepared as E5, E10, and E15/E20, the result of fuel consumption and emission will be compared with pure gasoline. The using of bioethanol hydrous as a fuel mixture was tended to produce more stable bioethanol fuel consumption. However, the utilization of the mixture was found able to reduce the exhaust emissions (CO, HC, and NOx).