No abstract

In analyzing the comparison of the cost of acceleration with the acceleration time used by the method Time Cost Trade Off. The analysis is done by using / shortening (crashing) time of implementation by using an alternative to increase working hours (overtime) for 3 hours. With apply the TCTO analysis, the implementation of the construction of the Sei Hanyu Bridge project after its duration performed calculations using the crash duration method, it was found that the time needed to accelerate the construction of the Sei Hanyu Bridge in Kapuas Regency for 1038 calendar days(148 weeks), can be accelerated 44 days from the original planning 1082 calendar days (155 weeks). With the acceleration of the completion of the construction of the Sei Hanyu bridge in Kapuas Regency, an additional fee of Rp. 175,160,710.43 is required with an additional cost (cost slope) of Rp 3,980,925.24 per day for 44 days, so the optimal costs needed to accelerate the construction of the Sei Hanyu bridge in Kapuas Regency was Rp. 45,102,729,928.11 originally planned for Rp.44,927,569,217.68

The implementation of construction projects generally carried out in construction contracts results in community apathy because they are not actively involved in the planning, implementation and maintenance operations of construction projects. The government launched the National Community Empowerment Program (PNPM). One of the PNPM programs initiated was the Rural Infrastructure Development Program (PPIP). Election Implementation of a construction project using a construction contract or community empowerment by considering several criteria and sub criteria so that the implementation of construction projects can be carried out effectively and efficiently. The measures discussed in implementing construction projects are time, cost, quality, community participation, administration, and independence. The Analytical Hierarchy Process (AHP) method is used to analyze the results of the questionnaire so that the criteria and sub criteria weighted as a consideration for the selection of construction projects. Based on the results of the analysis, we obtained the weights of the construction project implementation criteria, namely: time with a load of 0.198, costs with a capacity of 0.203, quality with an amount of 0.178, community participation with an amount of 0.118, administration with a weight of 0.139 and independence with a weight of 0.139. Then it is known that the construction contract weight is 1.045 and the influence of community empowerment is 0.955. Furthermore, the calculation of alternative weights carried out so that the criteria obtained: time, quality and administration took into account in the construction contract. Considerations: costs, community participation, and independence are taken into consideration by the project in community empowerment. Based on the results of the analysis shows that the implementation of construction projects is better done using a construction contract because it explicitly incorporated in its accountability. The cost criteria are the most significant factor and sub-criteria the accuracy of the start schedule of implementation occupies the highest score in the selection of the application of the construction contract.

Construction work includes the implementation of construction work and the community organizing the construction work itself. The implementation of this construction work must comply with the provisions regarding engineering, occupational safety and health, labor protection, and local environmental regulations to ensure the realization of an orderly implementation of construction work. The construction of the Kretek 2 Bridge in Bantul Regency, Special Region of Yogyakarta Province has its own challenges, because the location of the bridge is in an area prone to earthquakes and liquefaction or ground movement. With so many workers on this very high-risk project, there is a high probability of an accident occurring. The purpose of the study was to analyze (1) the risky work that could occur in bridge construction work, (2) the work that has the highest possible risk, (3) risk control, (4) the amount of investment costs required. The method used is the HIRADC method. The results of the study were (1) Risky work that can occur was a. High level of risk, including drowning, being dragged by the river current, being hit by heavy equipment maneuvers and falling from a height. b. Moderate risk level, including being crushed by formwork, falling material, scratched hands. c. Low level of risk, including landslides, heavy equipment maneuvers, iron puncture. (2) Work that has the highest possible risk is Pile Cap Excavation Work, Work Floor Work and Pier Head Ironing Work. (3) Risk control in bridge work consists of: Using a boat when measuring in rivers, Conducting briefings before starting activities, Using PPE life vests and placing life ring buoys on boats, Installing signs and placing officers in areas that intersect with roads, Installing guardrail of the project area, installing scaffolding as a working platform and inspecting its feasibility,  communicating hazards through signs, conducting refresh training for workers. (4) The investment cost required for implementing K3 on the Kretek 2 Bridge work in Bantul Regency was Rp. 6,545,998,310 or 1.795% of the contract value.

The construction of UGM Educator Flats in Sleman Regency has a total area of 7,035.5 m2 consisting of 6 floors in the form of rooms and management rooms for flats and 1 rooftop floor. The problem in implementing the construction of the UGM Educator Flats in Sleman Regency is that the available funds are limited, so value engineering needs to be carried out so that the construction can be completed as expected. Value Engineering aims to obtain the best value for a project or process by defining the functions required to achieve the value objectives and providing these functions at the lowest cost, consistent with the required quality and performance. The results of the study were (1) The work items for the UGM Sleman Educator House building that have the potential to be efficient are floor slab work t=12 cm, roof slab work t=15 cm, stair slab work t=15 cm and beam work. (2) The replacement design alternatives are: a. For beam work items, an alternative is to change formwork purchases to formwork leases, b. For floor slab work items, roof slab work items, stair slab work items, there are 2 alternatives chosen, namely replacing reinforcement with M10 wiremesh and changing formwork purchases to formwork rentals. (3) Cost savings achieved after Value Engineering was carried out by 11.47%, with details of work items as follows: a. Beam work, savings of 3.66%, b. Floor slab work t = 12 cm, savings of 5.55%, c. Roof slab work, t=15 cm, savings of 1.00 %, d. Ladder slab work, t=15 cm, savings of 1.26%. Compared to the Initial Design Budget Plan (RAB) of the project as a whole, the Alternative Design Budget Plan can save costs of 2.843%.