Development of JIT construction principles has for the most part centered on the field activities themselves. However, the ideology of JIT focuses on the entire value stream of an operation from raw material to final product delivery. Waste and inefficiency is still evident throughout construction supply chains. This research investigates improvement opportunities in this industry, utilizing the practice of JIT and IBS techniques together to make the project successful. The methodology adopted for the study includes literature review, observation, interviews and using questionnaire survey. These questionnaires will distribute to the respondents, which represent the professional in construction industry that have experience and knowledge on the IBS building technique technology and the construction techniques specially related to manage waste material and in- time construction procedure. Here the case study of Putrajaya presint-9 clearly shows how companies can work together in a harmonic and synchronized system meeting probably the most idealistic manufacturing principles of (JIT) and as well as IBS techniques to produce the best quality product within the shortest time frame with minimum/no wastage and cost-effective to all parties. Careful production planning, cost-benefit analysis, adequate outsourcing plans and customer orientation are being praises as the key success factors of this amazing Just-In-Time concept.
Just-in-time (JIT) is a management philosophy that strives to eliminate sources of manufacturing waste by producing the right part in the right place at the right time. Waste results from any activity that adds cost without adding value, such as moving and storing.JIT (also known as lean production or stockless production) should improve profits and return on investment by reducing inventory levels (increasing the inventory turnover rate), reducing variability, improving product quality, reducing production and delivery lead times, and reducing other costs (such as those associated with machine setup and equipment breakdown). In a JIT system, underutilized (excess) capacity is used instead of buffer inventories to hedge against problems that may arise. It has been established that JIT practice holds potential for improving construction. Since the early 1990s, lean principles and techniques adopted from the manufacturing industry have been examined for applicability in construction. The purpose behind this is to bring improvements to the construction process, similar to those seen in the manufacturing industry. Manufacturers have shown significant increases in productivity and quality, while reducing lead times. The construction industry has not shown these improvements and lags behind others in technology developments. Researchers and those practicing lean construction in the field have made significant progress up to this point. Many of these principles and techniques have been found to be effective in construction. JIT implementation has supported these views. Lean is a common-sense approach that focuses on the elimination of waste in an operation. The types of waste that are referred to here are: •
Defects in products
Unnecessary movement of people
Unnecessary transport of goods
JIT applies primarily to repetitive manufacturing processes in which the same products and components are produced over and over again. The general idea is to establish flow processes (even when the facility uses a jobbing or batch process layout) by linking work centers so that there is an even, balanced flow of materials throughout the entire production process, similar to that found in an assembly line. To accomplish this, an attempt is made to reach the goals of driving all queues toward zero and achieving the ideal lot size of one unit. The goal of JIT, therefore, is to minimize the presence of...
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