Optimization of Cost and Time Reduction through Value Stream Mapping Implementation

The present study examined the application of Lean Construction through Value Stream Mapping to reduce the overall time and cost involved in residential building construction. Conventional construction methods often lead to higher labor dependency, material wastage, process delays, and poor workflow coordination, which increase both project duration and expenditure. By preparing the Current State Map and Future State Map, the inefficiencies in the existing construction process were identified and improved methods were proposed. The comparative analysis of brickwork and plastering activities showed significant measurable improvement after introducing advanced construction alternatives. In brickwork, the use of AAC block masonry reduced the cost from ₹61,22,080 to ₹51,54,876 and reduced the execution time from 224 days to 194 days. Similarly, in plastering work, the automatic plastering machine reduced the cost from ₹2,63,875 to ₹2,50,681 and reduced the execution duration from 174 days to 120 days. These results indicate that mechanized and improved construction methods help in minimizing labor effort and increasing productivity. The overall project comparison also confirmed the effectiveness of Lean Construction implementation. The total project duration was reduced from 896 days to 677 days, resulting in a saving of 219 days or 24.4%. Likewise, the total project cost was reduced from ₹4,77,38,238 to ₹4,47,75,724, achieving a direct saving of ₹29,62,514 or 6.2%. Thus, it can be concluded that Value Stream Mapping is an effective tool for identifying non-value-added activities and improving workflow continuity in construction projects. The study proves that by adopting advanced construction methods and proper lean planning, residential projects can be completed in a more economical and time-efficient manner.

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