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Tuti Sumarningsih
Program Doktor Teknik Sipil Program Pasca Sarjana Universitas Diponegoro Semarang
Civil Engineering, Building, Construction & Architecture

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Idealisasi Penjadwalan Proyek Bangunan Gedung dengan Teknik Miller Sumarningsih, Tuti
MEDIA KOMUNIKASI TEKNIK SIPIL Tahun 16, Nomor 1, PEBRUARI 2008
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (160.326 KB) | DOI: 10.14710/mkts.v16i1.3661

Abstract

Bar Chart, the other name of Gantt Chart, is one type of sheduling form that  often used in construction project. The Bar Chart is usually completed with S Curve, that present the cumulative earned of work from time to time. The S Curve can be used to controlled the progress of work in any time. The analysis of Earned Value Concept, that analyze cost and time consumed of work simultaneously, is based on S Curve either. In many cases, the shape of S Curve is formed unless reffered to certain rule, so that the shape of letter “S” some times too steep or too slope slightly. To improve the shape of S Curve, Miller introduced the concept of S Curve that composed from three mathematic’s formulas. The three formulas that form three parts of  the curve are y = 0,0225 x2, y = 1,5 x – 25 , and y = - 125 + 4,5 x – 0,0225 x2  respectively. This curve is ideal, whereas the earned of the work in a certain unit time changes gradually, therefore meet the concept of resources levelling. Miller divided the duration of project excecution in three parts. Each part has a same length of  periode. The study of different length of periode for three parts shows that S Curve is not ideal, proved by the fluctuation of earned of work in significant value.                Keywords : S Curve, Earned of Work, Resources LevellingPermalink: http://ejournal.undip.ac.id/index.php/mkts/article/view/3661[How to cite: Sumarningsih, T. (2008), Idealisasi Penjadwalan Proyek Bangunan Gedung  dengan Teknik Miller, Jurnal Media Komunikasi Teknik Sipil, Tahun 16, No. 1, pp. 1-10]
Pengaruh Kerja Lembur pada Produktivitas Tenaga Kerja Konstruksi Sumarningsih, Tuti
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (458.74 KB) | DOI: 10.14710/mkts.v20i1.9247

Abstract

In order to meet the construction project completion, project duration often be compressed and work accelerated, especially in case the project held behind the schedule. One of several methods to accelerated a schedule is applying overtime work. Overtime work achieves schedule acceleration by increasing the amount of hours worked by labor beyond the typical 8 hours worked per day and 40 hours worked per week. Although there may be positive short-term benefits to working an overtime schedule, the long-term consequences are typically viewed as detrimental, such as fatigue, reduced productivity and safety, and increased absenteeism. The objective of this research is to present the effects of schedule overtime on construction labor productivity, and the impact of loss labor productivity to the labor costs. Overtime in this research is defined as the hours worked beyond the normal straight time hour (08.00 – 16.00). The data were collected by field observation and interview with the foremen. Field observation held in four weeks, with 28 labors included. The result of this research show a decrease labor productivity by 8,87% - 11,84%, and increase labor costs by 58,63% - 79,31%.
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