Browsing by Author "Manewa, RMAS"

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item: Thesis-Abstract
Achieving the best value through environmental sustainable construction : integrated process model
Manewa, RMAS
Value Management (VM) and Environmental Sustainability (ES) are increasingly becoming important tools to be considered in construction. VM is one of the recognized techniques that made substantial cost savings on construction projects and sustainability is about delivering better long term value for the built environment and its inhabitants. The attention on ES issues in VM remains untapped area due to scarcity of information. Theoretically, the intrinsic capabilities and the positive relationships between these two heighten VM position as an effective means for sustainability improvements. The purpose of this research study is to identify how the ES criteria could be incorporated into the VM process and it's acceptability by the construction clients. The research is focused on a development of a process model by combining both ES and the best value criteria to select construction materials. The research was placed in qualitative research philosophies as the aim was to generate rich data from the experiences of VM team to find the means of ES delivery in VM. This -research begins from the data gathered through a comprehensive literature review and unstructured interviews. Based on the literature review the Integrated Process Model (IPM) was developed. The developed model was tested through multiple case studies to find the client's acceptance towards the environment favourable material selection. It was found 47% of materials derived from the IPM are purely matching with the client's choice. By adopting this process model at the very early stages of material selection the acceptance can be improved further. The research can concluded that the VM and ES can be incorporated through the Integrated Process Model to select construction materials. Further the model has the high level of acceptance among the construction clients and the early application of the model provides multiple benefits to the project stakeholders. Key Words: Best Value, Value Management, Environment Sustainability, Construction Materials, Integrated Process Model
item: Conference-Full-text
Unveiling the potential of design for deconstruction in the circular economy
(Department of Building Economics, 2024) Guruge, K; Waidyasekara, KGAS; Jayasena, HS; Manewa, RMAS; Sandanayake, YG; Waidyasekara, KGAS; Ranadewa, KATO; Chandanie, H
The construction industry plays a vital role in fostering sustainability through various concepts and strategies being implemented globally. Among these, Circular Economy (CE) stands out as a prominent approach to enhancing sustainability. CE aims to move the industry away from the traditional linear model (i.e., build-use-demolish) towards a more sustainable circular approach. In the built environment, the ‘Design for Deconstruction' (DfD) aims to integrate planning for a building's end-of-life disassembly and material/component salvaging into the design process, thereby promoting sustainability through waste minimisation. However, the relationship between DfD and circularity is less evident. For example, most of the literature about DfD explains the potentials of end-of-life disassembly is limited in terms of discussion on the second life (potential reuse) of those disassembled materials/components. This research aims to bridge this gap. A detailed literature review has been undertaken to establish the status of DfD within the construction industry, including principles, practices, advantages, and barriers of DfD and its contribution to CE. The findings confirm that the blurred link between DfD and CE, and the required improvements in standardisation, awareness, and deconstruction information model/databases are the key priorities to enhance the circularity through DfD.