Camshaft lift is an important parameter that determines the height of the valve lift, calculated from the valve position when it is completely closed to the fully open position. This component plays a crucial role in regulating the flow of the air and fuel mixture into the combustion chamber. This study aims to improve the performance of a 200cc 4-stroke motorcycle engine through camshaft lift modification, which is expected to affect the characteristics of engine torque and power. Modifications were carried out by designing two types of modified camshafts, namely series A and series B, as a comparison to the standard camshaft. The research method used is experimental testing using a dynamometer to measure engine torque and power at various speeds, ranging from 4,000 to 10,000 RPM. The data obtained were analyzed to determine the effect of each type of camshaft on engine performance. The test results show that the B series camshaft provides the most significant performance improvement compared to the standard and A series camshafts. At 7,500 RPM, the standard camshaft produces an average torque of 19.2 Nm, the A series camshaft 19.6 Nm, while the B series camshaft reaches 21.2 Nm. Meanwhile, at 10,000 RPM, the average power of the standard camshaft is recorded at 22.2 HP, the A series camshaft 24.1 HP, and the B series camshaft reaches 26.3 HP. This increase indicates that the camshaft lift modification is able to optimize the duration and height of the valve opening, so that the supply of the fuel and air mixture to the combustion chamber becomes more efficient. Thus, camshaft modification, especially the B series, is an effective and applicable solution in increasing the performance output of a 200cc motorcycle engine without having to make major changes to the overall engine structure.

This study aims to determine the service provided by employees of UMKM Serba Cetak towards consumer satisfaction after completing a purchase or order at UMKM Serba Cetak. The study covers in accordance with the Key Performance Indicators consisting of six divisions and analyzes the level of service towards consumer satisfaction. The research method used involves observation for one month at UMKM Serba Cetak and interviews as well as distributing questionnaires to consumers who have made orders at UMKM Serba Cetak, as well as market data analysis to identify the relationship between excellent service and consumer satisfaction at UMKM Serba Cetak. The sample in this study was the entire population of 15 people; the analysis and testing tools used were IBM SPP Version 21 and Microsoft Excel. The results of the study showed that the work in accordance with the Key Performance Indicators experienced significant changes at UMKM Serba Cetak, such as increased sales and income every month, financial data was well managed, and online promotions received good engagement. Based on the results of the validity test with a value of 0.5140, which was declared valid, and the results of the CSI analysis obtained were 86.90%, which were declared very satisfied.

A web-based sales information system is a key element in the success of modern business, especially in the rapidly growing e-commerce era. Developing information systems that are responsive and adaptive to change is a major challenge in meeting dynamic market demands. The problem that occurs is that the web application that is built is not in accordance with the wishes and needs of the user so that applications and transactions are difficult to carry out. This article describes the implementation of the prototype method in developing a web-based sales information system, with a focus on aspects of needs analysis, design, development, implementation, and testing and evaluation. By developing a web-based sales information system with a prototype method, consumers can easily operate the application and make transactions easier because this system can be used anywhere and anytime and its development involves consumers, so this system can really be used well and easily.

Diagnostic codification must fulfill 10 characteristics of quality data, namely one of which is accurate, namely the truth and validity of data values. External Causes are external causes of fracture cases which classify based on the place and activity of the incident. It is very important that external causes codes are documented in medical record files for financing analysis, health services and reporting. The purpose of this study was to determine the accuracy of the fracture diagnosis code and external causes at Mardi Waluyo Hospital, Blitar City in 2021. The research method used a retrospective descriptive. The sampling technique is simple random sampling, with 52 samples. The implementation of coding at Mardi Waluyo Hospital, Blitar City, was carried out by coder officers and was in accordance with the policies and standard operating procedures at the hospital. The level of accuracy of the fracture diagnosis code with a percentage of 85% is included in the category that needs improvement and external causes with a percentage of 6% is included in the unsatisfactory category. The inaccuracy of the external causes code is caused by the use of the 5th character or the activity code that has not yet been coded. The inaccuracy of the officers in coding caused the resulting code to be inaccurate, so it was suggested that filling out medical record documents must be filled in completely and clearly to support proper and accurate coding of fractures and external causes so as to produce a better percentage of accuracy.