SUPPLY CHAIN RISK ANALYSIS OF CONCRETE MATERIAL WITH FAILURE MODE AND EFFECT ANALYSIS METHOD (CASE STUDY: X DAM PROJECT)

• Main Author: Arifin, Aisya
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68603
• Institution: Institut Teknologi Bandung

Construction projects for public infrastructure continue to increase. Infrastructure development aims to meet the needs of the community. One of the public infrastructures to meet the needs of the community is the construction of dams. Infrastructure development is the Strategic Plan of the Directorate General of Water Resources. One manifestation of the program is the operational strategy of multipurpose reservoirs and irrigation modernization. Dam X is one of 46 dams built in the 2020-2024 Strategic Plan period. The main material in the construction of dams is concrete. The volume of concrete required is large, which is approximately 600,000 m3. In addition, the dam is located in a remote area, which is 175 kilometers from the city centre. In addition, access to the dam location is difficult because the dam is located in a forest area and the road conditions do not have road pavement (concrete or asphalt). In this case, the supply chain of concrete materials encounters obstacles, namely the location of the dam which is quite difficult to reach so that the supply of material allows failure to occur. One of the sources of failure in the supply chain is the material is not available when it will be installed or there is material delay. Failure in the supply chain will have an impact on project failure. Failure in terms of costs is the occurrence of cost overruns, then in terms of quality, namely the quality is not in accordance with the requirements, and in terms of time, there is a delay in the project implementation schedule. These failures can be minimized or mitigated by using risk management. Risk management will control the risks that occur throughout the concrete material supply chain activities in the dam project. Risk in the supply chain is viewed from several aspects, namely from information, material, financial, supply, control, demand, and process. The method of risk management used in this study is Failure Mode and Effect Analysis. The Failure Mode and Effect Analysis method contributes to minimizing the risk of concrete materials, then detects or controls possible failures that occur in the concrete material supply chain, and FMEA also produces output, namely getting the dominant risk from all concrete material supply chain activities. The assessment used in the FMEA method is to calculate the value of Severity (severity), Occurrence (level of occurrence), and Detection (level of detection). Then the three values are multiplied and produce the Risk Priority Number (RPN). The Risk Priority Number with the highest value is the most dominant risk to be mitigated. Based on the results of risk analysis using the Failure Mode and Effects Analysis method, 22 risk factors were obtained with 7 risk factors included in the high risk category and 15 risk factors including medium risk. The calculation results from the Failure Mode and Effects Analysis method show that the highest RPN value with a score of 210 becomes the most dominant risk, namely the risk factor with the code X16. The risk factor is the difficult project location, making it difficult to supply materials or carry heavy equipment. Apart from the long distance, the physical condition of the road to the project site is not all using asphalt pavement structures. This has an impact on the difficulty of supplying materials or when carrying heavy equipment. The risk identification code X15, namely the delay in work from one of the stakeholders, ranks second in the top. However, when viewed from the risk matrix, the X15 code, which is ranked 2, is on the Severity 4 scale and Probability is on a 4 scale, while the X1 code which is ranked 1 is on the Severity 4 and Probability scale values on a scale 3. This reflects that there is a delay. the work of one of the stakeholders is a risk with a high probability value because during the Covid-19 pandemic, government regulations related to the Implementation of Community Activity Restrictions (PPKM) were often carried out considering the high number of Covid-19 spreads. PPKM has an impact on the implementation of construction projects, namely delays in implementation work on the Dam X project. In addition, risk factors that occur along the supply chain of concrete materials are delays in work from one of the stakeholders, re-delivery of material due to damage during supply, material damaged and not in accordance with construction requirements, lack of communication network in the project, and difficulty in finding materials.