ANALYSIS ON SCHEDULING ACCELERATION FOR CONSTRUCTION PROJECT OF WEST SUMBA BAPPEDA BUILDING USING TIME-COST TRADE-OFF METHOD
R.M.H. Come, Kustamar
2019
Russian Journal of Agricultural and Socio-Economic Sciences
The construction project of West Sumba BAPPEDA (Development Planning Agency at Sub-National Level) Building, in the fiscal year of 2016, is located at Weekarou Street in Loli Sub-District of Waikabubak City of West Sumba District (East Nusa Tenggara) and is according to construction agreement contract No 04/PPK-LELANG/BAPP/2016 dated June 24, 2016 with a contract value of IDR 3,415,700,000. The construction project of West Sumba BAPPEDA Building began on June 24, 2016 with a completion time
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... t of 180 days. The deadline for project completion is on December 20, 2016. Until the 5th week of the second month, the implementation of the project experiences delays that were caused by a lack of workforce. Due to the deadline for the scheduling plan, the construction project must complete all work. Therefore, the government issued an addendum for adding 50 days of project completion time. Based on these problems, the scheduling time acceleration plan needs to be reviewed. The scheduling acceleration of the construction project of West Sumba BAPPEDA Building is conducted by adding workforce to acceleration activities that have the lowest cost slope using the Time-Cost Trade-Off (TCTO) method. The scheduling is conducted using Gantt chart in the Microsoft Project scheduling application. The process of scheduling acceleration is carried out through 4 acceleration processes based on the types of activities that are on the critical path and have the lowest cost slope value. The results of scheduling acceleration are stopped in the fourth duration of the acceleration process because acceleration process has fulfilled the target with a total of 177 days ≤ 180 days and costs of IDR 7,034,600 from the normal duration of 201 days and costs of IDR 5,939,600. It obtained an additional acceleration cost from the normal duration as much as IDR 1,095,000. The scheduling acceleration using the Time-Cost Trade-Off (TCTO) method is carried out by adding a workforce of 24 days from the normal project schedule of the 201 to 177 calendar days. The total additional cost is IDR 14,871,462 from the planned cost according to the contract of IDR 3, 105,189,408.66 to IDR 3,120,060,870.66. KEY WORDS Cost, critical path, scheduling, time acceleration. Construction planning is the most basic stage in the management and implementation of construction projects. Success in its implementation is determined by several things, for example estimating good resources, determining the duration for each individual, choosing good technology, and identifying each interaction of various work tasks. Complete and appropriate planning and scheduling are the main keys to the successful implementation of the project on time (Whardana & Al Huda, 2017) . In achieving its objectives, project activities have three constraints which are important parameters for measuring the success of a project which include the accurate budget (Cost), schedule (Time), performance and quality (Quality) (Suharto, 1995) . The larger the scale of a project, the more complex the management of scheduling. Scheduling is part of construction planning that can provide information about the schedule and progress of the project in terms of performance of resources in the form of costs, workforce, equipment, materials, project duration plans and time progress for project completion (Assaf & Al-Hejji, 2006) . Scheduling is always referring to assumptions and
doi:10.18551/rjoas.2019-01.40
fatcat:fuyrhoxh6bgp5dbrkeebqi2zny