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All Journal KADIKMA SIGMA TEKNIKA
Permatasari, Putri Ayu
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering

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PENGEMBANGAN MEDIA PEMBELAJARAN MATEMATIKA INTERAKTIF SCHOOLOGY BERBANTUAN SOFTWARE GEOGEBRA MATERI TRANSFORMASI GEOMETRI KELAS XI Permatasari, Putri Ayu; Dafik, Dafik; Fatahillah, Arif
Kadikma Vol 7 No 1 (2016): April 2016
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v7i1.5469

Abstract

Abstract. This research is conducted to describe the process of learning media development and to know the product learning media development of mathematic interactive Schoology software Geogebra based on transformation geometry at class XI SMKN 2 Jember. This research is research of development based on development model 4D that describe by Thiagarajan wich consist of 4 stages, namely define, design, develop and disseminate. Subject of this research is students of class XI at SMKN 2 Jember at Multi Media with 1 thep students number are 32 students. Data collection in this research used validation sheets model from 3 validators, teachers interview, user quetionair and students score test. The result was analysed in descriptive form the result of research, the result of the media’s validity level is 93% or in other words the prevalence level is in the “High” category, the practical level is seen from students activity quetionnaire researching 84,2% or can be categorized as “Good” and the effectiveness level of 81,25% is in the “Practical” criterion, so it can be said that developed learning media worthy to be tested. Keywords : Geogebra, Learning Media, 4D Thiagaran Models, Schoology.
ANALISIS FAKTOR KETERLAMBATAN PROYEK MENGGUNAKAN METODE FAULT TREE ANALYSIS (FTA) DAN PENJADWALAN ULANG DENGAN CRITICAL PATH METHOD (CPM) PADA PROYEK MANUFAKTUR REPLACE 54IN SEA WATER LINE DI PT. SRK Permatasari, Putri Ayu; Ismiyah, Elly
SIGMA TEKNIKA Vol 8, No 2 (2025): SIGMATEKNIKA, VOL. 8, N0. 2, NOVEMBER 2025
Publisher : Fakultas Teknik, Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/sigmateknika.v8i2.8408

Abstract

Proyek manufaktur Replace 54in Sea Water Line di PT. SRK semula direncanakan selesai dalam 49 hari, tetapi terlambat 26 hari menjadi 75 hari. Penelitian ini menggunakan Fault Tree Analysis (FTA) untuk mengidentifikasi penyebab utama keterlambatan, yaitu pekerjaan drawing engineering, dan menghasilkan 4 langkah perbaikan bagi kontraktor. Penjadwalan ulang dengan Critical Path Method (CPM) menunjukkan bahwa penambahan jam kerja lembur 4 jam selama durasi proyek dapat mempercepat penyelesaian menjadi 32 hari dengan biaya tambahan sebesar Rp 16.000.000. Alternatif penambahan tenaga kerja mempercepat proyek menjadi 32 hari dengan biaya tambahan Rp 13.500.000. Kesimpulannya, penambahan tenaga kerja lebih efektif dari segi biaya untuk mencegah keterlambatan pada proyek Replace 54in Sea Water Line berikutnya.
Co-Authors Arif Fatahillah D. Dafik Elly Ismiyah