Browsing by Author "Perera, CSR"

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item: Conference-Full-text
Client’s impact to the schedule Delays in road projects: contractor’s perspective
Abeykoon, MMGD; Zainudeen, N; Perera, CSR; Madhuwanthi, HAS
The problem of schedule delay is a frequent and regular phenomenon in the construction projects. Road construction of Sri Lanka is no exception. Client as a key project participant has a control on duration of construction phases. This makes client a casual cause for schedule delay. However, contractor also is a major suffering party due to unprecedented delays. Therefore, this research is aimed at investigating the contractor’s perspective of client’s impact to the schedule delay in rehabilitation and widening road projects (RWRP) in Sri Lanka. Initially, a comprehensive literature review aided to identify types and effects of delay in road construction projects. Further, identified literature was refined in the sense of Sri Lankan context through three number of preliminary interviews. Next, six cases were selected considering RWRPs in Sri Lanka and steered a document review to investigate the influence of the involvement of the client for delays. Then, a questionnaire survey was carried out to examine the significance of client’s causes for delay on contractor’s perspective and to identify the client’s best practices including suggestions to minimize the delays in RWRPs in Sri Lanka. The analysed data confirmed that delayed interim payments to the contractors due to monetary difficulties of the client, change orders by the client throughout the construction period, delay in land acquisition and delay in handing over the site for construction work as key client causative factors. This study request client to adhere with the identified best practices to mitigate schedule delays in RWRP in Sri Lanka.
item: Article-Full-text
An integrated approach of Lean-Green construction: Sri Lankan perspective
(Emerald, 2020) Pandithawatta, TPWSI; Zainudeen, N; Perera, CSR
Construction industry hesitates to associate Green concepts on building projects mainly due to its high initial investment cost. Even if it is economical in the long run, often the benefits are suppressed with the costs generated through non-value-adding activities in the construction process. Lean construction principles have proved to eliminate such waste while enhancing the construction process. Thus, the purpose of this paper is to explore the applicability of the integration of Lean and Green concepts in the construction industry.
item: Conference-Full-text
Integrating lean and green concepts: Sri Lankan construction industry perspective
(Ceylon Institute of Builders, 2018-06) Pandithawatta, TPWSI; Zainudeen, N; Perera, CSR; Sandanayake, YG; Gunatilake, S; Waidyasekara, KGAS
Construction industry developers and project teams usually struggle to associate the concept of Green on building projects since it is generally resulting in high initial investment cost. Although this cost of investment can be saved back through operational stage, the current building project delivery methods implemented by most project teams are often laden with non- value adding activities. Lean construction principles have been convinced to eliminate flow activities and improve construction process performance in highly complicated building construction projects. Hence, the aim of this research is to explore and develop a framework to integrate Lean and Green concepts to the Sri Lankan construction industry. At the outset, the key features and principles of Lean and Green construction were identified to build the conceptual relationship between the two concepts. Subsequently, a qualitative research approach was adopted through the means of expert opinion survey with unstructured interviews involving ten number of local expert professionals who have experience and exposure to both of these concepts. The findings were analysed through content analysis. The perception of the Sri Lankan stakeholders towards the application of integrated Lean-Green concepts is focused on a positive direction. The identified enablers to implement the integrated concept supersede the barriers by confirming the appropriateness of the application in the local construction industry. The Green concept was integrated into the activities that are implemented under each Lean construction principle. Finally, a framework was developed through the findings to guide the implementation of integrated Lean- Green application in Sri Lankan context.