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This book presents the adaptation of lean principles to the precast construction industry to eliminate or minimize construction wastes, by modeling the precast construction process influencing manpower requirements. This is done using the shared mental models theory to understand how the lean principles enable people to work together to complete the tasks and work together effectively as a team throughout the entire precast construction process from the design, production and logistics to installation stages. Besides the theoretical concepts, this proposed book also presents the practical aspects faced by contractors through the conduct of questionnaire surveys to understand how the implementation of lean principles and shared mental models will affect the occurrence of construction wastes and hence the changes in the total man days used during the precast construction process. This book also presents a neural network model for developing leading indicators that classify precast construction projects in accordance with the manpower changes achieved through the construct of lean principles and shared mental models. This is to help the construction industry to predict the risk of low construction productivity and enable effective lean implementation to optimize the manpower effort required.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

Abstract
Low construction productivity growth has been a global phenomenon for at least fifty years (Naoum 2016). Apart from developing countries, Australia, Canada, European countries, Japan, and United States (US) have for decades recorded declines or slowdown in measured labour productivity in construction (Fulford and Standing 2014; Nasir et al. 2014).
Joy Ong, Low Sui Pheng

Chapter 2. Construction Productivity in Singapore

Abstract
In Singapore, the government has introduced numerous initiatives to boost productivity in the construction industry. From the 1960s–1970s, the focus was labour-driven as part of Singapore’s industrialisation efforts.
Joy Ong, Low Sui Pheng

Chapter 3. Precast Construction

Abstract
The industry needs to change its design approach and construction processes, with an emphasis on moving towards precast construction to improve buildability upstream and ensure constructability downstream so that lesser foreign workers or manpower is required. With less site work, precast construction provides a safer construction environment as workers do not need to work-at-height for prolonged period and only need to handle simple tools for screws, bolts, and nuts.
Joy Ong, Low Sui Pheng

Chapter 4. Lean Construction Implementation

Abstract
Lean first emerged in the construction industry back in the 1980s after it had gained full acceptance in the West, particularly the US and Europe, because of the dramatic improvement to their manufacturing operations.
Joy Ong, Low Sui Pheng

Chapter 5. Shared Mental Models Development

Abstract
In this chapter, it is proposed that the shared mental models theory provides a theoretical foundation to explain the importance of lean construction implementation for total manpower reduction in precast construction. This is because the literature on lean construction and the literature on shared mental models theory have an overlapping interest in improving team performance which corresponds to the main emphasis of this research on reducing manpower effort in precast construction by eliminating construction wastes that does not deliver value. Through this application, this research anchors the conceptual model development to underpin the tenets of enabling lean in precast construction, rather than a discussion of how shared mental models theory applies to each lean principle.
Joy Ong, Low Sui Pheng

Chapter 6. Research Design and Methodology

Abstract
The objectives of this research were discussed in Chapter One. In Chapter Two, literature of the Singapore’s construction industry in terms of productivity advancement was reviewed to provide an understanding of the issues, effectiveness of measures taken and outlook of productivity growth in the years to come. In Chapter Three and Four, an extensive literature review of how precast construction and lean construction came about, factors that causes construction wastes in precast construction and the implementation of lean to streamline the total manpower requirements were discussed. The conceptual model was then set up in Chapter Five.
Joy Ong, Low Sui Pheng

Chapter 7. Results and Analysis

Abstract
The purpose and overall structure of the research analysis to give an overview of the steps taken in this research to analyse the findings obtained is shown.
Joy Ong, Low Sui Pheng

Chapter 8. Case Study

Abstract
This chapter aims to prove that inputs of the neural network model generated was effective to allow contractors to predict the risk of low construction productivity at an early stage of the precast construction process and enable them to proactively take actions to further optimise the total man-days to be utilised in the subsequent precast construction stages.
Joy Ong, Low Sui Pheng

Chapter 9. Conclusion and Recommendations

Without Abstract
Joy Ong, Low Sui Pheng

Backmatter

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