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All Journal CommIT (Communication & Information Technology) Al-Jabar : Jurnal Pendidikan Matematika Prosiding Seminar Nasional Teknik Mesin
Abdillah, Abdul Azis
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Aerospace Engineering Computer Science & IT Control & Systems Engineering Education Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Manajemen Tata Letak Tool Store di Workshop Alat Berat Politeknik Negeri Jakarta Menggunakan Metode Class Based Storage Farhan, Farhan; Christy, Nazha Ali; Wahyudi, Imam; Abdillah, Abdul Azis
Seminar Nasional Teknik Mesin 2019: Prosiding Seminar Nasional Teknik Mesin 2019
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Manajemen ini bertujuan untuk menata ulang tata letak alat pada tool store di workshop Alat Berat ,Politeknik Negeri Jakarta. Manajemen tata letak tool store di workshop tidak efektif. Penataan tidak berdasarkan jenis dan fungsinya serta tempat yang tidak strategis sehingga menyulitkan proses peminjaman. Untuk memperbaiki hal tersebut perlu adanya penataan ulang tata letak (relayout) dan pendataan ulang alat berdasarkan pengelompokan jenis dan fungsinya, yaitu membuat manajemen baru yang lebih efektif dan strategis. Metodologi yang digunakan yaitu Class Based Storage yang terbagi beberapa tahapan, yaitu membuat daftar seluruh barang pada tool store, pengukuran dimensi tool store, pembuatan desain tata latak tool store, pengelompokan barang-barang pada tool store hingga peremajaan tool store. Prosedur yang diterapkan dari metode ini adalah membuat daftar barang sesuai kategori, mendesain tata letak yang efektif, meletakkan barang yang sesuai kategorinya dan pembaharuan kode lemari dan kode barang. Setelah dilakukan penerapan prosedur-prosedur manajeman tata letak tool store menggunakan metode class based storage, dilakukan pengujian dengan menggunakan media formulir kuesioner dan wawancara langsung pada toolman sehinga dapat disimpulkan perbaikan tata letak dan penempatan barang-barang menggunakan metode class based storage memiliki index penilaian lebih baik dari pada tata letak sebelumnya.
Program Evaluation and Review Technique (PERT) Analysis to Predict Completion Time and Project Risk Using Discrete Event System Simulation Method Yudistira, I Gusti Agung Anom; Nariswari, Rinda; Arifin, Samsul; Abdillah, Abdul Azis; Prasetyo, Puguh Wahyu; Susyanto, Nanang
CommIT (Communication and Information Technology) Journal Vol. 18 No. 1 (2024): CommIT Journal
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/commit.v18i1.8495

Abstract

The prediction of project completion time, which is important in project management, is only based on an estimate of three numbers, namely the fastest, slowest, and presumably time. The common practice of applying normal distribution through Monte Carlo simulation in Program Evaluation and Review Technique (PERT) research often fails to accurately represent project activity durations, leading to potentially biased project completion prediction. Based on these problems, a different method is proposed, namely, Discrete Event Simulation (DES). The research aims to evaluate the effectiveness of the simmer package in R in conducting PERT analysis. Specifically, there are three objectives in the research: 1) develop a simulation model to predict how long a project will take and find the critical path, 2) create an R script to simulate discrete events on a PERT network, and 3) explore the simulation output using the simmer package in the form of summary statistics and estimation of project risk. Then, a library research with a descriptive and exploratory method is used for data collection. The hypothetical network is used to obtain the numerical results, which provide the predicted value of the project completion, the critical path, and the risk level. Simulation, including 100 replications, results in a predicted project completion time and a standard deviation of 20.7 and 2.2 weeks, respectively. The DES method has been proven highly effective in predicting the completion time of a project described by the PERT network. In addition, it offers increased flexibility.
Unimodular matrix and bernoulli map on text encryption algorithm using python Arifin, Samsul; Muktyas, Indra Bayu; Prasetyo, Puguh Wahyu; Abdillah, Abdul Azis
Al-Jabar: Jurnal Pendidikan Matematika Vol 12 No 2 (2021): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ajpm.v12i2.10469

Abstract

One of the encryption algorithms is the Hill Cipher. The square key matrix in the Hill Cipher method must have an inverse modulo. The unimodular matrix is one of the few matrices that must have an inverse. A unimodular matrix can be utilized as a key in the encryption process. This research aims to demonstrate that there is another approach to protect text message data. Symmetric cryptography is the sort of encryption utilized. A Bernoulli Map is used to create a unimodular matrix. To begin, the researchers use an identity matrix to generate a unimodular matrix. The Bernoulli Map series of real values in (0,1) is translated to integers between 0 and 255. The numbers are then inserted into the unimodular matrix's top triangular entries. To acquire the full matrix as the key, the researchers utilize Elementary Row Operations. The data is then encrypted using modulo matrix multiplication.
Co-Authors A.A. Ketut Agung Cahyawan W Christy, Nazha Ali Farhan Farhan I Gusti Agung Anom Yudistira Muktyas, Indra Bayu Puguh Wahyu Prasetyo, Puguh Rinda Nariswari Samsul Arifin Samsul Arifin Susyanto, Nanang