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All Journal Jurnal Teknik Sipil Giratory Upgris Journal of Economic, Business and Engineering (JEBE) International Journal of Sustainable Building, Infrastructure and Environment
Suwandi, Putri Anggi Permata
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Mechanical Engineering Transportation

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Cost and Time Control Analysis in the Neucentrix Building Renovation Project Using the Earned Value Method Pinuji, Putri; Suwandi, Putri Anggi Permata; Rizani, Mohammad Debby
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 1 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i1.20122

Abstract

In the Neucentrix renovation project, an addendum caused an extension. This study analyzes the weekly performance of the 2023 Neucentrix Pugeran Yogyakarta Project in terms of cost and time using the Earned Value method. The data analyzed using the Earned Value method using ACWP, BCWS, and BCWP indicators. From these indicators, CV, SV, CPI, SPI, EAS and EAC values are obtained. The analysis reveals cost savings from the first to the seventeenth week, with initial acceleration in the first four weeks followed by delays from weeks five to seventeen. The project is expected to take 19 weeks to complete, with a final estimated cost of IDR 2,294,673,540.
Analysis of Time Management Implementation Using the Crashing Method on the Rehabilitation Project of the Disdikbudpora Hall Building in Semarang Regency Ramadhany, Shinta Ayu; Suwandi, Putri Anggi Permata; Husodo, Ibnu Toto
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 7, No 1 (2026)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v7i1.24267

Abstract

This study analyzes the application of time management using the crashing method on the Rehabilitation Project of the Disdikbudpora’s Hall Building in Semarang Regency. This project has an implementation period of 57 calendar days. To assess whether this duration could be optimized, the crashing method was applied to critical path activities by adding overtime work hours (1 to 3 hours/day). The research utilized a qualitative method with a quantitative approach, using primary data from field observations and secondary data such as schedules and weekly reports. Results showed that by adding 1, 2, and 3 hours of overtime, the project duration could be reduced to 54, 49, and 48 days, respectively. Cost analysis revealed that adding 2 hours of overtime provided the most optimal balance between shortened duration and additional labor costs, totaling IDR 58,556,562.50. This option offered a 5 day acceleration with a relatively small cost difference compared to 1 hour overtime. Therefore, adding 2 hours of overtime is considered the most efficient strategy for project acceleration.
ANALYSIS OF VEHICLE OPERATING COSTS USING METHOD (PACIFIC CONSULTANT INTERNATIONAL) PCI ON SEMARANG TOLL ROAD SECTION A AND NON-TOLL ROAD (KRAPYAK-JATINGALEH) Mahendra, Rega; Asih, Veni; Suwandi, Putri Anggi Permata; Yudaningrum, Farida
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 3, No 1 (2022)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v3i1.11710

Abstract

Abstract. The Semarang toll road is the only toll road network in the city of Semarang at this time. The construction of toll roads aims to reduce congestion and improve travel time efficiency. In addition, the benefit of toll roads is that toll road users will benefit in the form of vehicle operational cost savings (BOK) and time compared to if they pass through non-toll roads. For alternative routes or non-toll roads, conventional roads can be chosen by motorists without passing through toll roads. This study aims to calculate vehicle operating costs (BOK), vehicle operating cost benefits (BKBOK) using the Pacific Consultant International (PCI) method as a limit to determine toll rates and analyze the comparison of Vehicle Operating Costs (BOK) on toll and non-toll roads. . Data collection techniques in this study used primary and secondary data collection techniques. The analysis was carried out using an interactive analysis model. The calculation of vehicle operating costs using the PCI method is taken from the lowest vehicle operating costs from various speed variations. For toll roads, the lowest vehicle operating costs occur at a speed of 60 km/hour with a total BOK of Rp. 6,803.54. Meanwhile, for non-toll roads, the lowest vehicle operating costs occur at a speed of 60 km/hour with a total BOK of Rp. 10,641.27. According to the analysis we have obtained, toll roads are cheaper than non-toll roads. For road users in the city of Semarang, it is recommended to use the Semarang section A toll road compared to non-toll roads, because vehicle operating costs are more efficient and have a much faster travel time.Keyword : BOK,BKBOK, speed, PCI, Toll Road
Parking Analysis at Banyumanik 2 General Hospital, Semarang City Khoir, Muhamad Walidul; Setiawan, Muhammad Agus; Suwandi, Putri Anggi Permata; Yudaningrum, Farida
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 2 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i2.21020

Abstract

Vehicle movement will be hampered if the available parking space is insufficient to meet the needs of the facility itselfThe method taken in making this final assignment is to use quantitative methods.the total parking revenue in the Banyumanik 2 Hospital area, Semarang City at the time of the research, based on predetermined parking planning, resulted in an estimated parking levy of Rp. 888,000.00,- per 2 hours.This planning results in a total parking pattern of 46 cars and 153 motorcycles. total income during the research was IDR 668,000.00 per 2 hours. Based on parking planning during research with 46 car lots and 153 motorbikes, there is a total planned levy of IDR 888,000.00 per 2 hours.
COST EFFICIENCY ANALYSIS AND RISK MANAGEMENT OF THE SELF-MANAGED BATCHING PLANT METHOD MUSI TOLL KAYU AGUNG-PALEMBANG-BETUNG BRIDGE PROJECT Supriyono, Joko; Kristiawan, Agung; Ramadhani, Vicha Silviana; Suwandi, Putri Anggi Permata
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 7, No 1 (2026)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v7i1.27063

Abstract

This study was conducted on the Musi Bridge Project of the Kayu Agung–Palembang–Betung Toll Road to determine the most efficient and controlled concrete supply method, considering the high proportion of concrete costs, potential distribution delays, and structural quality requirements in strategic infrastructure projects. The research aimed to compare the self-managed batching plant method and the ready-mix method in terms of cost efficiency, technical and non-technical risks, and concrete quality performance. A quantitative descriptive-comparative approach was applied using primary data from project documents, including cost summaries, material quantities and prices, job mix formulas, risk matrices, and quality testing reports, supported by field observations. The analysis involved cost calculations, risk scoring and categorization, and evaluation of compliance with technical specifications. The results show that the self-managed method achieved cost savings of 15.7% and lower risk levels compared to the ready-mix method, while both methods met structural quality requirements. Therefore, the study concludes that self-managed batching plants are more effective for large-scale projects when supported by adequate technical and operational capacity. Keywords: concrete supply method, self managed batching plant, ready-mix concrete, cost and risk analysis ;
Analysis of the reliability value of building safety System (nkskb) and level of occupants readiness in facing Fire at johar market, semarang, central java (south johar) Esterida, Berliana; Jaryati, Jaryati; Suwandi, Putri Anggi Permata; Rizani, Mohammad Debby
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 3, No 1 (2022)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v3i1.12715

Abstract

Abstract. Public buildings are buildings used by people from various walks of life, which are built or intended not for the benefit of private residences, but for the general public which are identical to community service centers (Siti Azizah, 2013). One of the public buildings is the Johar market, Semarang. An important aspect of a public building is fire safety. The purpose of this study was to determine the level of reliability of the public building security system against fire hazards in the Johar Semarang market (Johar Selatan), and the readiness of the occupants of the Johar Semarang market building in the face of fire disasters. The method used in this research is descriptive-quantitative research method which is collecting data obtained from interviews, field notes, personal documentation, researcher notes, and other supporting documents. The results of the analysis of the utility component assessment of the four variables resulted in a Building Safety System Reliability Value (NKSKB) of 86.12%, based on these results it can be concluded that the reliability value of the building is in good and safe condition. The level of readiness of residents in facing the danger of fire disasters is still in the poor category with an average level of readiness of residents of 51.12%. This shows the need for increased application of protection systems and rescue facilities, especially for several protection systems that are still damaged and not functioning as well as socialization to residents regarding the use of fire extinguishers, fire simulations, and the need to provide adequate PPE.Keywords: Public Buildings, Level of Reliability, Occupancy Readiness
Six Sigma-DMAIC (Define, Measure, Analyze, Improve, And Control) Analysis in Reducing Building Structural Defects (Case Study: Emirates Indonesia Cardiology Hospital Project) Mustika, Risti; Suwandi, Putri Anggi Permata; Kristiawan, Agung
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 2 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i2.24619

Abstract

Abstract. Construction projects often face challenges in maintaining quality, one of which is structural defects that can affect the quality and safety of the building. This study aims to analyze the level of defects in column, beam, and slab structures using the Six Sigma DMAIC method and provide solutions to improve these defects. The study was conducted on the Emirates Indonesia Cardiology Hospital Building Construction Project in Surakarta. The method used is a quantitative descriptive approach with the stages of Define, Measure, Analyze, Improve, and Control. Data were obtained through field observations, interviews, documentation, and secondary project data. The analysis results show that the average sigma level value is above 3, with the highest level in the column structure reaching 4.3 sigma for the type of concrete flow defect. The main causes of defects come from human factors, work methods, materials, and supervision. Improvement solutions are formulated using a fishbone diagram analysis approach and the assistance of NVIVO software for qualitative data analysis. This study shows that the Six Sigma DMAIC method is effective in identifying and reducing defects in concrete structure work and can be used as a quality control strategy in construction projects.Keywords: Six Sigma, DMAIC, Structural Defects, Construction Quality, NVIVO
ANALYSIS OF PARKING CHARACTERISTICS AND THE EFFECT OF ON STREET PARKING ON TRAFFIC PERFORMANCE Zulvia, Avita; Rizani, Mohammad Debby; Suwandi, Putri Anggi Permata
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 3, No 1 (2022)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v3i1.12903

Abstract

The space are available for park vehicle on the edge road in the area center city and along main street thing to do with permanent there is restrictions and controls as well as Settings or often called on street parking(Clarkson Grg Lesby and Bary Hicks, 1988). Study this background behind by trouble performance then traffic that is less than optimal is caused by the presence of on street parking on lane bicycle on Kartini Street, Salatiga City. In resolve problem the required existence analysis about characteristics parking and influence on-street parking along Kartini Street, Salatiga City. Method used in study this that is method approach descriptive quantitative. Collecting the data obtained from results interview, notes field, documentation private, notes researchers, and documents residents other. Study this show that characteristics parking and influence on-street parking to performance then traffic on Kartini Street, Salatiga City for duration parking belong to Category 1 and significant high turnover duration short, in general vehicle parking not enough from one hour with duration parking short in general for parking in the center spending, with capacity street 2489,22 pcu/hour, speed current free 37,665 km/hour vehicles as well as level service belong to category Level Of Service (LOS) B (0.20-0.44) with characteristics current stable, speed a little limited by past traffic, driver still could free in choose the speed.
Analysis of The Effect of Change Orders on Implementation Time and Construction Labor Costs in The Development Project of The Joint Lecture Building III at Unimus Rinaldi, Bramantyo; Suwandi, Putri Anggi Permata; Kristiawan, Agung
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 1 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i1.21537

Abstract

Change orders resulted in a total time deviation of 45 days (18.75%) from the initial plan, with the most substantial delays in structural and MEP work. Regarding labor costs, MEP work experienced the largest deviation at 25% (IDR 150,000,000), followed by foundation work (16.67%), structural work (15%), and architectural work (10%). Change orders also impacted labor productivity, particularly in MEP work (-25%), followed by foundation (-16%), structural (-12.5%), and architectural work (-12.5%). These productivity decreases resulted from changes in work methods, increased complexity, and adaptation requirements to new specifications. The study recommends several measures to minimize change order impacts: more thorough design reviews before implementation, allocation of time and cost buffers, improved documentation and approval systems, and more flexible workforce planning. Effective change order management is crucial for maintaining overall project success.
Co-Authors Agung Kristiawan Alfafa, Jannah Rahmah Arahman, Muhammad Reza Arif, An Zaenal Asih, Veni budirahardjo, slamet budirahardjo Didik Purnomo, Didik Esterida, Berliana Fauzi, Dwi Achmad Hanafi, Irfan Hermanto, Wilarso Hizballah, M Firoos Ibnu Toto Husodo, Ibnu Toto Ikhwanudin Ikhwanudin Irawan, Arie Kris Jaryati, Jaryati Khoir, Muhamad Walidul Lathif, Busyro Mahendra, Rega meliana, siti rissa Mohammad Debby Rizani Mustika, Risti nikmah, alfi alfiatun nugraha, agra febyola lova Pinuji, Putri Prayoga, Bagas Ramadhani, Vicha Silviana Ramadhany, Shinta Ayu RAMADHONY, FERDY YOLA Rinaldi, Bramantyo Rohman, syamsul Rosiyani, Tissa Rahayu saifudin, ananda lukman Saputro, Bayu Singgih sentanu, arga Setiawan, Muhammad Agus Suep, Muhamad Supriyono, Joko Syakur, Asy WIDYANINGSIH, MAY KRISTINA Yudaningrum, Farida Zulvia, Avita