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Background: Contact tracing has been essential to reducing spread of COVID-19. Singapore leveraged technology to assist with contact tracing efforts using a Bluetooth-based app and token platform called 'TraceTogether'. Methods: We reviewed the impact of this system during the country's Delta and Omicron waves (24 August 2021 to 17 February 2022) to identify differences in number of close contacts and time savings between full automation using TraceTogether alone as compared to manual contact tracing supplemented by TraceTogether. Characteristics of digital contact tracing app or token users were reviewed. Thereafter, the number of close contacts identified by manual and digital contact tracing methods, and the number of confirmed COVID-19 cases among contacts were analysed. The difference in time taken for identification of close contacts was also determined. Findings: Adoption rate for TraceTogether was high, with 93.3% of cases having a registered device. There was a 9.8 h (34.9%) reduction in time savings for close contacts to be informed using TraceTogether alone compared to manual contact tracing supplemented by TraceTogether. The proportion of close contacts automatically identified through TraceTogether alone and turned positive was 3.6%. For those identified through manual contact tracing supplemented by TraceTogether, this proportion was 12.5% and 6.2% for those served quarantine orders and health risk warnings respectively. Interpretation: The high adoption rate of 'TraceTogether' suggest that digital solutions remain a promising option to improve contact tracing in future epidemics. This may have been through its concurrent use with vaccine differentiated public health measures and policies which engender public trust. There is future potential for utilising such technology in managing communicable diseases to achieve good public health outcomes. [ABSTRACT FROM AUTHOR]

The construction industry in Singapore is dominated by a competitive business environment that is being driven by a lowest cost mentality. The pressure on contractors' profit margins has further increased after a prolonged recession in this sector, which has seen construction demand and output shrinking significantly. This paper examines the factors that contractors perceive to be important when they are considering the size of their bid mark-up. The research hypothesis is that contractor size would have a significant bearing on the factors that would influence the bid mark-up decision. Forty factors were identified and a survey was conducted. The results showed that contractor size has a significant impact on their attitude towards bid mark-up decision-making. The analysis also showed that when deciding the size of a bid mark-up large contractors tend to be more concerned with the nature of the construction work while medium-size contractors are more concerned about the state of their own companies finance. [ABSTRACT FROM AUTHOR]