http://hdl.handle.net/10453/35197 2026-06-05T20:24:03Z http://hdl.handle.net/10453/195100 Title: An Empirical Study of Contractors’ Bidding Trends in Recurrent Bidding: A Case of Singapore Public Sector Construction Projects Authors: Zhang, Y; Oo, BL; Runeson, G; Lim, BTH Abstract: There have been limited empirical studies that aimed to establish the tenability of the stationarity assumption in recurrent construction bidding, and thus the need for and importance of allowing for continuity in bidding models remain unexplored. This study examined the bidding trends of individual contractors according to their level of experience in recurrent bidding, to test the tenability of the stationarity assumption. The data sample was a past bidding dataset of Singapore public sector construction projects over a five-year period between 2017 and 2021, with over 8000 bidding records from more than 900 contractors. The results show that there were statistically significant changes in the contractors’ bidding trends, irrespective of their level of experience in recurrent bidding and different time periodicities, ranging between 10 and 20 months. Thus, the stationarity assumption that contractors behave in a probabilistically consistent way over time, regardless of changing conditions, was untenable for the data sample involved. The observed changes in the contractors’ bidding trends cannot be regarded as random, but represent a continuous strategic process in response to changes in market forces. It is postulated that the possible causes of changes vary among individual contractors, in which there are a set of varying internal and external factors they consider at the time of bidding. The findings have implications for future bidding modelling attempts, in allowing for continuity in recurrent bidding. Contractors should systematically review and re-optimize their bidding strategy by leveraging their historical bidding data and bidding feedback information from clients, since their potential competitors will do the same thing for recurrent bidding. 2025-02-01T00:00:00Z http://hdl.handle.net/10453/193391 Title: Viewpoint: opening up the conversation on planning for disability equity and inclusion in Australia with a new discussion paper Authors: Stafford, L; Taylor, M; Holmes, A; Traill, A; Bailey, D; Henderson, T; Novacevski, M Abstract: Planning for Equity and Inclusion will play a critical role in planning futures. Yet to be successful, we must ensure we are including and planning for everyone. To date, there has been little policy and practice guidance on planning for disability equity and inclusion. This viewpoint presents a recent discussion paper written by Australian Planners, some who identify as having different disabilities,11 Disability is widely encompassing term including physical, sensory, cognitive, neurological, psychosocial impairments, Deaf/deaf or hard of hearing, mental health needs, chronic-illness and neurodivergence.as a way to start to close these gaps. The paper is underpinned by research from a four-year Planning Inclusive Communities project. The purpose of writing the discussion paper is threefold: 1. To lead the planning profession in a discussion on disability inclusion and equity. 2. To build awareness on how our planning profession can contribute positively and support disability inclusion and equity more widely. 3. To help build capacity and empower practitioners. Furthermore, the paper also suggests a pathway forward. The hope of this viewpoint is to raise awareness of the discussion paper and to stimulate conversations on Planning for Equity and Inclusion for all Australians, which is a pre-requisite to achieving liveable, sustainable communities, cities and regions. Disability is widely encompassing term including physical, sensory, cognitive, neurological, psychosocial impairments, Deaf/deaf or hard of hearing, mental health needs, chronic-illness and neurodivergence. 2025-04-03T00:00:00Z http://hdl.handle.net/10453/192291 Title: Community participation in 3R (Reduce, Reuse and Recycle) of household plastic waste in Balikpapan Authors: Prasaningtyas, A; Rini, IDWS; Basransyah,; Harfadli, MMA; Rachmannia, NC Abstract: The 3R (Reduce, Reuse, Recycle) effort is focused on reducing plastic waste generated from household activities. Community participation is very necessary in realizing efforts to reduce plastic waste. This research aims to analyse community participation regarding efforts to reduce 3R plastic waste (Reduce, Reuse and Recycle) based on the amount of generation and composition of household plastic waste in Balikpapan City. The data used in this research are primary and secondary data. Measurement of waste generation and composition data refers to SNI 19-3964-1994. Participation data collection was carried out by distributing and filling out questionnaires offline to the public with a total of 100 families of respondents obtained from the Slovin method calculation in determining the sample size. The results of this research showed that the average generation of household plastic waste from 100 families in Balikpapan City was 9.55 Kg/day with the highest composition of plastic waste dominated by PET at 3.14 Kg/day. Community participation in Reduce efforts was 68% in the “good” category, Reuse was 58% in the “good enough” category and Recycle was 29% in “not good” category. 2025-01-01T00:00:00Z http://hdl.handle.net/10453/192266 Title: Adaptability and Implementation of Climate-Resilient Retrofit Toolkits for Older People Authors: Wu, S; Lohi, I; Rasouli, AH; Wain, A; Wilkinson, S; Towart, L; Acosta, I; Banihashemi, S Abstract: Following the Black Summer Bushfires of 2019–2020, a number of bushfire-resilient retrofit toolkits started to emerge across Australia and were made available to homeowners in affected areas. These retrofit toolkits primarily address property maintenance and building construction to comply with the Australian Standard 3959-2018 Construction of Buildings in Bushfire Prone Areas. However, these toolkits are not tailored to the diverse housing needs and capabilities of the growing population of Australians over 65, the most vulnerable and affected age group during the event of natural disasters. Therefore, the purpose of this research is to examine the adaptability and implementation of available bushfire-resilient retrofit toolkits with consideration to the needs and perceptions of older people. This paper presents a critical literature review of global, National, State, local, and independent guidance on building for bushfire resilience, through the lens of building construction and architecture. It identifies the challenges and gaps in knowledge for how to tailor disaster-resilient guidance for older people. It further presents a future research agenda to adopt universal design principles into available retrofit guidance to promote inclusive climate action. This paper is part of a broader research project funded by the Australian Black Summer Bushfire Recovery Grants Program. 2025-01-01T00:00:00Z