Garuda - Garba Rujukan Digital

Delays in Construction Project : A Review Kamandang, Zetta Rasullia; Casita, Cintantya Budi
IPTEK Journal of Proceedings Series No 6 (2018): International Conference on Advanced Engineering and Technology (ICATECH) 2018
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2018i6.4631

Delays in construction projects schedule is one of the most noticed problems. Delays may be caused by several project parties and further categorized into excusable non-compensable delays (EN) caused by many factors beyond partiesâ€™ control, excusable-compensable delays (EC) caused by the owner, and non-compensable delays (NE) caused by the contractor. Another issue is concurrency in delays. The result of concurrent delay often leads the project parties into complicated situations. Thus, understanding the causes and identifying the types of delays are essential to be done before executing the delay analysis methods in order to allocating the liability of each party. This study concludes that some existed schedule delay analysis methods produce different results, therefore, the practitioners or schedule delay analyst should understand the anticipated results that can be accepted by all construction projects parties.

PENILAIAN RISIKO FINANSIAL DENGAN MENGGUNAKAN SIMULASI MONTE CARLO (Studi Kasus Gedung STIKES Maharani Malang) Kamandang, Zetta Rasullia; Unas, Saifoe El; Negara, Kartika Puspa
Jurnal Mahasiswa Jurusan Teknik Sipil Vol 1, No 2 (2014)
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (580.856 KB)

Dalam menjalankan bisnis usaha konstruksi diperlukan manajemen risiko sehingga perusahaan konstruksi dapat terhindar dari kerugian-kerugian yang bisa terjadi di kemudian hari, utamanya kerugian finansial. Salah satu hal yang dapat menimbulkan kerugian finansial adalah kesalahan saat penyusunan rencana anggaran biaya (RAB). Untuk menghitung estimasi RAB proyek dengan tidak mengurangi analisis manajemen risiko maka dapat digunakan simulasi Monte Carlo. Penelitian ini bertujuan untuk mengetahui estimasi biaya proyek pembangunan Gedung Stikes Maharani Malang untuk setiap tinjauan prestasi pekerjaan 25%, 50%, 75% dan 100% berdasarkan simulasi Monte Carlo dengan menggunakan software Microsoft Excel dan Matrix Laboratory (MATLAB). Simulasi Monte Carlo merupakan penerapan metode Monte Carlo yang bertujuan untuk menganalisis perambatan ketidakpastian. Simulasi Monte Carlo melibatkan penggunaan angka acak (angka random) untuk memodalkan sistem sehingga pada penelitian ini digunakan dua software untuk menentukan angka random yaitu Microsoft Excel dan MATLAB dimana angka random yang diambil merupakan angka diantara nilai minimum dan maksimum setiap jenis pekerjaan yang dilakukan di proyek dan dilakukan pengulangan sesuai dengan jumlah iterasi yang terjadi dengan relative error 2% untuk kemudian dianalisis grafik frekuensi dan distribusi normalnya. Hasil perhitungan untuk setiap tinjauan prestasi pekerjaan 25%, 50%, 75% dan 100% dengan Microsoft Excel didapatkan hasil Rp.551.595.027,00, Rp.1.314.281.050,00, Rp.1.979.274.780,00 dan Rp.2.749.950.172,00. Sedangkan hasil perhitungan MATLAB adalah Rp.602.271.117,00, Rp.1.310.689.823,00, Rp.1.980.164.824,00 dan Rp.2.740.729.439,00. Hasil tersebut merupakan nilai rerata dari grafik frekuensi dan distribusi normal dan menunjukkan peluang terbesar dana yang dikeluarkan oleh perusahaan untuk mencapai prestasi pekerjaan yang ditinjau. Berdasarkan perhitungan dua software tersebut tidak terdapat perbedaan hasil yang besar dan kesalahan relatif cenderung kecil yaitu dibawah 1% kecuali untuk perhitungan pada tinjauan prestasi 25% dimana kesalahan relatifnya mencapai angka 8%. Kata Kunci: simulasi Monte Carlo, penilaian risiko finansial, angka random, manajemen risiko finansial

Identification of Critical Path Changes and Concurrent Delays Using EDAM Method for Building Project Kamandang, Zetta Rasullia
Journal of Applied Sciences, Management and Engineering Technology Vol 1, No 1 (2020)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jasmet.2020.v1i1.867

Achieving a project whose punctually in completion date and duration is one of the main purposes of the project planning. However, avoiding the issue of the delay is hard to do. Delays itself commonly divided into three types, EN, EC and NE delays that represent the contribution of each project parties. Furthermore, the concurrent delay is at different levels that often use as a tool against each other parties. In term of preventing the time-frame problems, the critical path method (CPM) is widely applied. In the delay analysis technique, the EDAM method employs CPM to identify the critical path changes and the occurred concurrent delays. Implementing a six-floor building as-planned schedule and its delays information as a case study, this research results show that the critical path of the building has changed eight times and the concurrent delay occurred on the first change with six days of delays. By identifying the critical path change, project parties are expected to be able to prevent continuously delays by escalating the work progress. Furthermore, the information about concurrent delays would be essential in avoiding disputes regarding this issue. Project parties would be aware of their contribution to critical path changes by knowing their caused delay in that time period.

Analytical study of reduced beam sections under monotonic load Casita, Cintantya Budi; Kamandang, Zetta Rasullia
IPTEK Journal of Proceedings Series No 6 (2018): International Conference on Advanced Engineering and Technology (ICATECH) 2018
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2018i6.4630

This paper presents the result of three different type of reduced beam sections (RBS): radius cut, straight cut, and tapered cut under monotonic load using finite element analysis. Load is applied monotonically and divided into 9 steps, start from 500 N to 4500 N, which increasing 500 N for each step, continuously. The dimension for the beam is WF 500x200x10x16 is used for those three types of RBS. The results show that radius cut gives better performance than the other two types. Stress distribution, load-stress curve, and load-displacement curve of those three types of RBS are compared as the result, then lead to the conclusion that the most effective connection amongst those three types of RBS above is RBS with Radius Cut.

Analisa Kebisingan di Ruas Jalan Arteri Kota Surabaya Serta Korelasinya Dengan Nilai Volume Lalu Lintas Zetta Rasullia Kamandang; Hendrata Wibisana; Cintantya Budi Casita
Jurnal Aplikasi Teknik Sipil Vol 18, No 2 (2020)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Sound pollution is a negative impact that occurs from the accumulation of the number of vehicles on a road where vehicles with each other crammed together to be able to drive without slowing down. This study aims to map the value of noise caused by motorized vehicles on arterial roads in the West Surabaya region. As for the method used to do the mapping is the application of geographic information systems based on primary data obtained in the form of vehicle volume and noise values measured by the tool sound level meter, analysis is done using multiple regression and correlation analysis with distribution t. The results obtained from this study are mathematical models of noise on various types of vehicles as well as a correlation model of noise with a degree of saturation. From this study it can be concluded that there is a positive correlation of noise with the degree of saturation where the mathematical model obtained Noise = 137.45 * DS + 34.76, for each increase in the degree of saturation will increase the noise value, in other words the degree of saturation is directly proportional to noise

Analysis of Changes in Sea Surface Temperature During 2017-2021 at The Coast of Ujung Pangkah Gresik with Landsat 8 Satellite Image Data Hendrata Wibisana; Zetta Rasullia Kamandang; Kartini
Nusantara Science and Technology Proceedings International Seminar of Research Month 2021
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2022.2455

Changes in sea surface temperature play an important role in climate change that occurs especially in coastal areas such as Ujung Pangkah Gresik. Changes that occur on the coast will affect the lives of people in the area, and these changes will result in anomalies in climate change and other natural phenomena. The purpose of this study is to find changes in Sea Surface Temperature for 5 years to find the right formula for modeling the impact of these changes, which can be overcome in the future. The method developed here is remote sensing technology with Landsat 8 satellite imagery data to extract the digital number value which is converted into a reflectance value to then look for the optimal mathematical model algorithm with parameters of changes in sea surface temperature. The result of this research is that the wavelength of the red channel is the wavelength that can provide the most optimal results compared to the blue channel, the green channel, and the IR channel. From these wavelengths, an exponential mathematical model and a power model are generated which have the best correlation values among several other calculated models. From this study, it can be concluded that Landsat 8 satellite imagery can provide an overview of changes in sea surface temperature on the coast, especially for shallow waters such as Ujung Pangkah Gresik, so that in the future it can be used as an alternative in decision making in coastal management.

Identification of Critical Path Changes and Concurrent Delays Using EDAM Method for Building Project Zetta Rasullia Kamandang
Journal of Applied Sciences, Management and Engineering Technology Vol 1, No 1 (2020)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jasmet.2020.v1i1.867

Achieving a project whose punctually in completion date and duration is one of the main purposes of the project planning. However, avoiding the issue of the delay is hard to do. Delays itself commonly divided into three types, EN, EC and NE delays that represent the contribution of each project parties. Furthermore, the concurrent delay is at different levels that often use as a tool against each other parties. In term of preventing the time-frame problems, the critical path method (CPM) is widely applied. In the delay analysis technique, the EDAM method employs CPM to identify the critical path changes and the occurred concurrent delays. Implementing a six-floor building as-planned schedule and its delays information as a case study, this research results show that the critical path of the building has changed eight times and the concurrent delay occurred on the first change with six days of delays. By identifying the critical path change, project parties are expected to be able to prevent continuously delays by escalating the work progress. Furthermore, the information about concurrent delays would be essential in avoiding disputes regarding this issue. Project parties would be aware of their contribution to critical path changes by knowing their caused delay in that time period.

Evaluasi Kinerja Proyek pada Proyek Konstruksi Jalan dengan Menggunakan Metode Nilai Hasil Zetta Rasullia Kamandang
Journal of Civil Engineering Science and Technology (CI-TECH) Vol. 3 No. 01 (2022): April 2022
Publisher : PROGRAM STUDI TEKNIK SIPIL - UPN "VETERAN" JAWA TIMUR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/ci-tech.v3i01.53

The fundamental goal of project management is to finish a facility building project on schedule and within budget while adhering to defined standards and specifications. No matter how great the construction project plan is, if frequent and timely reviews are not done throughout project execution, neither the project progress nor the plan's efficacy can be evaluated. The Earned Value Method (EVM) is one of the tools used in project management that integrates scope, cost and time or schedule measures and provide an accurate picture of current project state at the time of control. This research implements the EVM to road construction project to observe the project performance during its execution and to estimate the cost and the duration of the project completion. Based on the calculation, the project team has efficient performance in using their time and cost for week one until week three, but it decreased especially in time of execution (0,864 of SPI value). Further calculations predict the project needs to prepare Rp. 115.935.300,00 to finish with Rp. 264.828.113,00 of total cost while the TE value shows this project will be finished one week behind its initial planning if no corrective action is done.

Comparative Analysis of The Cost of Conventional and Precast Concrete Slabs on High-Rise Building Projects Diah Kurniawati Ningtyas; Arilia Regita Tri Cahyani; Zetta Rasullia Kamandang; Muh. Darul Muttaqin; Rizky Nur Cahyanto
Journal of Civil Engineering Science and Technology (CI-TECH) Vol. 3 No. 2 (2022): October 2022
Publisher : PROGRAM STUDI TEKNIK SIPIL - UPN "VETERAN" JAWA TIMUR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/ci-tech.v3i2.63

Construction processes, particularly floor slab systems, can be executed using precast/precast methods as technology advances. Compared to traditional methods, which need more time and production expenses, precast/precast methods are more cost-effective for floor slab formwork, neater, and have a more consistent finish. This study is based on an eight-floor building project with 92 residential units on a 3,500 m2 plot of land and a 1,700 m2 building size. This investigation used two technologies: conventional precast slab and full slab precast. The purpose of this research is to compare the most cost-effective strategy for reducing production costs on floor slab work for the construction of the case study. Based on the calculation results, the full slab precast method is 14.31% or around Rp. 980,508,000 is more economical than the conventional method. For the conventional method, the total cost is Rp. 3,914,657,000 while for the precast method, the result is Rp. 2,934,149,000.

Analysis of Variance and Correlation Study of Chlorophyll-a in North and South Coast of Lombok Island Using Aqua MODIS Image Data Hendrata Wibisana; Siti Zainab; Zetta Rasullia Kamandang; Muhammad Rusdi
Aceh International Journal of Science and Technology Vol 9, No 2 (2020): August 2020
Publisher : Graduate Program of Syiah Kuala University

Chlorophyll-a mapping is widely used in the coastal environment. The mapping results can be utilized as guidance for fishing activities. The presence of chlorophyll-a in phytoplankton is much investigated concerning the existence of fish as a source of livelihood for fishermen around the globe. One method extensively developed is the use of satellite imagery to map the chlorophyll-content in the coastal region from a small area to a global scale, such as Aqua MODIS image data. This study aims to monitor the distribution of chlorophyll-a on the north coast and south coast of Lombok island. Analysis of variance and parametric statistical tests with t-distribution was utilized to examine the correlation between the two types of chlorophyll-a distribution of the coast area, Lombok Island. The result shows that the distribution of chlorophyll-a concentrations on the north coast and the south of the coast is not the same abundance; the south coast of Lombok island has smaller variances, with the concentration distribution is relatively the same. It differs from the north part; the distribution shows less diversity. This result indicates that a reasonably wide interval wherein some coordinates has a relatively diffuse chlorophyll-a concentration with a sufficiently high distribution level. Analysis of variance result also shows that both the north and south coasts have different fertility levels for their coastal waters, which are characterized by the growth rate of chlorophyll-a on the surface water along the coastal region examined

Title

Found 14 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 14 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 14 Documents
Search