Abstract
Addis Ababa road construction projects fail to be executed on time, within the allocated budget, and with the desired quality. To solve this problem, a new management concept is introduced, namely, lean construction. It is known to increase productivity and minimize waste. And, to realize this solution, last planner system (LPS) is used; it is a tool of lean construction and it involves a person or group of people with the task to control the production unit. The objectives of this study are to examine the current construction process management practice in Addis Ababa city road construction projects, to identify and prioritize the expected barriers of the last planner system implementation in Addis Ababa road construction projects using the super decision model, to identify and prioritize last planner system implementation benefits to Addis Ababa road construction projects using the super decision model, and to develop a conceptual framework for the last planner system implementation to enhance the current construction management system in Addis Ababa city road construction projects. To address the problems, questioners, observations, interviews, focus group discussions, and recently published journals were employed as qualitative and quantitative data collection tools and analyzed using statistical package for the social science version 26 and super decision model version 3.2. The finding shows that the construction management process adopted in all three sites is more or less similar, as they use a push planning system and critical path method to determine the duration following the master schedule but have no weekly work plan and lookahead schedule to forecast the coming week’s duty; also, they use a push planning system, for materials. The LPS implementation expected barriers are also ranked from one to five: Labor related, internal working environment related, stakeholders related, exogenous related, and material related expected barriers, respectively. The last planner system has many benefits as agreed by different scholar. Time-related, cost-related, claim-related, and quality-related benefits are the main benefits obtained through the LPS implementation, and it is possible to conclude that LPS is useful for road construction management process. Moreover, the LPS implementation conceptual framework was also developed based on the last planner system principles.
Highlights
Road transportation is a crucial component of the economic and social development process, often absorbing a high proportion of the national budget
If not all, business economies, personal economies, and public economies are the result of this transportation system. e road transport system of a developed or developing country represents a major part of that country’s infrastructure significance both in terms of investment made in creating the highway network and its effect on the country’s economic development [1]
Lean construction tools are intended to improve the delivery systems and processes by minimizing wastes, increasing productivity, and health and safety, and overall, achieving client’s requirements [3]. e last planner system is one tool of lean construction, where it involves a person or group of people with the task to control production unit. ey are responsible for necessitating control of workflow, verifying supply stream, design, and installation in all the production units
Summary
Road transportation is a crucial component of the economic and social development process, often absorbing a high proportion of the national budget. Is study aims to assess the usefulness of the Last Planner System implementation to advance the current construction management system in Addis Ababa Road projects. E general objective of this study is to assess the usefulness of the last planner system implementation to advance the current construction process management system in Addis Ababa city road projects. Ere are many benefits of implementing last planner system in road construction projects Some of these are: reduction of variability, improvement in team motivation, empowerment of the project team, early participation of stakeholders, reduction of equipment usage, risks reduction, better production control, safety improvement, logistic improvement, an opportunity for buildability/constructability review, early identification of key barriers, improvement of quality, re-work reduction, and more efficiency in the construction process [7]. In LPS, control is handed over to comparatively lower ranks on-site rather than to the higher ranks in the hierarchy [8]
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