Toward construction JIT

Ballard, Glenn; Howell, Gregory A.

doi:10.4324/9780203345825_toward_construction_jit

Cited by 49 publications

(69 citation statements)

References 1 publication

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“…However, traditional CPM network analysis has a number of limitations, which have been dealt with in numerous previous studies. These limitations include the inability to model continuous and simultaneous work flows of teams on the construction site, which need to be taken into account in case of overlapping, interdependent activities [12,13]. Location-based scheduling methods have been developed to take into account the location of work on the site to avoid conflicts between overlapping activities [14].…”

Section: Existing Methods For Schedule Monitoring and Controlmentioning

confidence: 99%

“…Several types of buffers are used in project plans [21]: a. Inventory buffers consist of stocks of materials and finished components, and of plan buffersbacklogs of work for crews that are used to ensure reliable workflows [12]. b. Contingencies consist of time buffers (extra time allotted for activities) and reserve funds in the budget.…”

Section: Control Actionsmentioning

confidence: 99%

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Real-time Schedule Control

Isaac¹

2016

Proceedings of the International Symposium on Automation and Robotics in Construction (IAARC)

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-Numerous previous studies have dealt with the use of automated technologies for on-site, real-time data collection to support construction project control. Most of these studies are based on the assumption, that the collected data can be compared with planning data to identify deviations and implement control actions. However, construction scheduling often focuses on pre-construction forecasting and logistics processes that are carried out by middle management. In contrast, the execution proper is governed by informal short-term scheduling, performed ad-hoc by site management. This reality creates discrepancies between the data provided by automated monitoring technologies and the information that can be obtained from project schedules, in terms of their granularity, scope and underlying assumptions. The aim of this paper is to review existing scheduling methods, and compare their outputs with the data provided by automated monitoring technologies. Ways are proposed in which scheduling methods can be enriched in order to better support monitoring and control processes.

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Section: Existing Methods For Schedule Monitoring and Controlmentioning

confidence: 99%

Section: Control Actionsmentioning

confidence: 99%

Real-time Schedule Control

Isaac¹

2016

Proceedings of the International Symposium on Automation and Robotics in Construction (IAARC)

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“…JIT material deliveries are also inevitable in confined job sites most especially in busy downtown areas with restricted lay-down areas. The advantages of JIT in construction include reduced inventories, improved quality and increased productivity (Ansari & Modarress 1990;Ballard and Howell, 1995;Pheng & Chuan, 2001;Pheng & Tan, 1998).…”

Section: Introductionmentioning

confidence: 99%

Impact of Building Information Modeling on Just-in-Time Material Delivery

Ocheoha¹,

Moselhi²

2013

Proceedings of the 30th International Symposium on Automation and Robotics in Construction and Mining (ISARC 2013): Building Th

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The purpose of this research is to evaluate the impact of Building Information Modeling (BIM) on Just-In-Time (JIT) material delivery, with a focus on how the use of BIM can help improve efficient implementation of JIT and reduce the cost of material management. Previous research and a number of case studies have addressed the positive impact of BIM on construction at large but none focused on JIT in construction. This paper presents a methodology for selecting reliable material vendors. It also utilises the integration of BIM and scheduling software to generate quantities of material and its required delivery time to improve the flow process and improve its reliability to minimise related delays and productivity losses arising from idle and non-productive time of equipment and labour on jobsites. 4D visualization is utilized to support coordination and timing of JIT material deliveries in an effort to minimize congestion on job sites. Case studies on JIT material deliveries are presented and the impact of BIM implementation on reducing the cost of material management is evaluated. The joint effect of BIM and JIT on quality control, elimination of waste, reduction of inventory buffers, and on relationships with material vendors are evaluated by analysing and comparing data from case studies. The paper also presents a methodology based on multi-attribute decision criteria for modelling the selection criteria for material vendors. The model can assist in ranking vendors not only based on cost and quality but also on their reliability in delivering material on time.

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“…Ballard (1995), on the other hand, believed that buffer is based on the uncertainty level ef the target or the sum of 50% of each activity duration [3]. Also Demmy (1994) [10].…”

mentioning

confidence: 99%

“…The project includes steel structure inanufacturing in the shop (activities [1][2][3][4][5][6][7][8][9][10][11][12], structure work on the site (activities [13][14][15][16][17][18][19][20][21][22][23][24] and the stee) structure assembly (act,ivit,ies [25][26][27] Equations (1) - (6 [20]. VL'ith complete support from project resources, the bottleneck is not delayed, …”

mentioning

confidence: 99%