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Journal : Hexagon

ANALISIS BIAYA DAN WAKTU PADA PROYEK PENINGKATAN JALAN DENGAN METODE EARNED VALUE Fardila, Dinda; R Kamagi, Siti Nurholisa; Ali Topan, Paris; Husainy, Zainuddin
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4044

Abstract

Cost and time are important variables in a construction project. Significant cost and time deviations can indicate poor project management, so there is a need for evaluation and control regarding this matter. In this research, researchers evaluated costs and time using the Earned Value Concept method. Performance evaluation of time and cost was carried out using Microsoft Project. Cost performance using the Earned Value Method means that there is a cost overrun of IDR 1,206,432.85 from the total construction budget plan (overbudget). This is shown by the EAC (Estimate to Complete) value of IDR 11,536,477,946.05 which is greater than the BAC (Budgeted All Construction) value of IDR 11,535,271,513. Performance when using the Earned Value Method has SV values ??in the July-October period showing positive values, namely IDR 175,140,527.07, IDR 175,138,345.20, IDR 175,140,527.07, IDR 32,838,848.83, this value shows that the project was realized faster than planned. Performance based on the schedule productivity index (SPI) in the July period has a value of 1.037894631, August has a value of 1.02648206, September has a value of 1.019104588, and October has a value of 1.002926831. This SPI value shows >1, meaning that the realized work productivity is carried out faster than the planned schedule.
SISTEM DOSING PUMP BERBASIS ARDUINO UNO R3 UNTUK MENAMBAH NUTRISI TANAMAN HIDROPONIK: SISTEM DOSING PUMP BERBASIS ARDUINO UNO R3 UNTUK MENAMBAH NUTRISI TANAMAN HIDROPONIK Hidayatullah, Muhammad; Khairil; Etiana, Eka; Andriani, Titi; Ali Topan, Paris
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4093

Abstract

Currently, many hydroponic plants are still provided with nutrition manually. Therefore, a device was created that is capable of providing nutrition automatically using a dosing pump and Arduino Uno R3. This research aims to find out how to add nutrient solutions automatically. The method used is an experimental method which includes: the tool design stage, testing stage, and data collection stage. To design the tool, all components are assembled into one with Arduino Uno. The results of the dosing pump test with a time variation of 1-30 seconds produced an increasing amount of nutrient solution and the amount of nutrient for each increase in time was around 0.3-0.4 ml. This tool will turn on if the input value is >2.7 and the PWM (Pulse Width Modulation) used is 255. It is hoped that this tool will be useful for the community as a reference when cultivating organic plants in the future.