Constructability Concepts for Engineering and Procurement

O’Connor, James T.; Rusch, Stephen E.; Schulz, Martin J.

doi:10.1061/(asce)0733-9364(1987)113:2(235)

Cited by 72 publications

(50 citation statements)

References 4 publications

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“…Although the researcher could not identify similar previous investigations with which to compare the findings of this study, the results obtained correlate well with the buildability principles on the one hand, i.e., design standardization, rationalization, and repetition, and the hypothesized effects of such factors by other researchers on construction productivity, on the other. O'Connor et al (1987) as well as Alshawi and Underwood (1993) discussed the negative effect of the variability of element sizes and the influence of grid patterns on the complexity of the construction process. However, their work was limited to general guidelines without any quantification of the impacts of such factors on the construction productivity.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…Several previous research and literature discussed the importance and positive influence of repetition on productivity (CIRIA 1999;Dong 1996;Ferguson 1989;Fischer and Tatum 1997;Moore 1996;O'Connor et al 1987). Labour inputs for formwork activities include substantial amount of laborious measurements, assembling, and at times, cutting to required sizes and shapes, which would be saved as a result of shutter size repetition.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

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The Impacts of Buildability Factors on Formwork Labour Productivity of Columns

Jarkas

2010

Journal of Civil Engineering and Management

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Abstract. The impacts of buildability on formwork labour productivity of major in situ reinforced concrete elements such as, foundations, walls, columns, beams and slabs, are yet to be determined and quantified. The labour unit cost of columns formwork, in comparison with other constituents of the reinforced concrete frame, is constantly higher due to the forming complexity of these elements, especially non-rectangular shapes, and the small output achieved in the operation. Therefore, the objective of this research is to investigate the impacts of buildability factors on columns formwork labour productivity. To achieve this objective, a large volume of productivity data was collected and analyzed using the categorical-regression method. As a result, the impacts of the grid patterns, variability of column sizes, repetition, total and average shutter size, and geometry of columns are quantified. Apart from the variability of column sizes, the findings show significant effects of these factors on labour productivity, which can be used to provide designers feedback on how well their designs consider the requirements of buildability principles, and the consequences of their decisions on labour efficiency. Moreover, the depicted patterns of results may provide guidance to construction managers for effective activity planning and efficient labour utilization.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Section: Discussion Of Resultsmentioning

confidence: 99%

The Impacts of Buildability Factors on Formwork Labour Productivity of Columns

Jarkas

2010

Journal of Civil Engineering and Management

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“…O'Connor et al [5] have presented and analyzed seven concepts for improving constructability during engineering and procurement phase of the project. These concepts are: Construction driven schedule, Simplified designs, Standardization, Module engineering, Accessibility, Adverse weather and Specifications.…”

Section: The Concept Of Constructabilitymentioning

confidence: 99%

Application of Design Structure Matrix (DSM) for Managing Projects on the Basis of Constructability

Khan¹

2016

cea

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Project Management techniques have been developed by many researchers from time to time, to make optimum use of resources. Constructability and Design Structure Matrix are also to be listed among such tools. An attempt has been made in this study to bring together and utilize the best of the management processes to achieve project success. There are mainly two stages of the study. Firstly, construction projects are studied from the point of view of Constructability and a list of thirty activities identified, under three different heads. These activities are then surveyed with a sample group of thirty architects and data regarding their dependency and independency are collected. Based on suitable scores, the data is used to create Design Structure Matrices, which are further processed for iterations, in the second stage. The paper aims to study the advantages of applying DSM to the activities, which are based on the concept of Constructability. The results obtained after the final iterations of DSM, give multidimensional analysis regarding their parallel run, sequencing and networking etc. The DSM's obtained before and after the iterations help prove, that the complex Construction projects can be managed more efficiently after applying DSM.

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“…The influence of buildability on the construction process has been the subject of numerous previous investigations [8,9,10,11,12,13,14,15,16,17,18,19,20,21] to name a few. However, a thorough examination of the literature revealed a dearth of research into the influence of buildability on the labour productivity of an integral trade of the in situ reinforced concrete material; namely, formwork.…”

Section: Engineering Science and Technology Reviewmentioning

confidence: 99%

Analysis and Measurement of Buildability Factors Affecting Edge Formwork Labour Productivity

Jarkas¹

2010

JESTR

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Labour productivity is affected by several factors, but buildability is among the most important. Nevertheless, a thorough examination of the literature revealed a dearth of research into the influence of buildability factors on labour productivity of in situ reinforced concrete construction, especially at the formwork trade level. Although edge formwork is an important labour intensive activity, most often, its labour cost is either crudely estimated or lumped within the formwork cost of other activities. Therefore, the objective of this research is to investigate and quantify the effects and relative influence of the following buildability factors on its labour productivity: (a) depth of slab being edge-formed; (b) slab geometric factor; and (c) type of formwork material used. To achieve this objective, a sufficiently large volume of productivity data was collected and analyzed using the multiple categorical-regression method. As a result, the effects and relative influence of the buildability factors investigated are determined. The findings show significant effects of these factors on edge formwork labour productivity, which can be used to provide designers feedback on how well their designs consider the requirements of buildability principles, and the consequences of their decisions on labour efficiency. On the other hand, the depicted patterns of results may provide guidance to construction managers for effective activity planning and efficient labour utilization.

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Constructability Concepts for Engineering and Procurement

Cited by 72 publications

References 4 publications

The Impacts of Buildability Factors on Formwork Labour Productivity of Columns

The Impacts of Buildability Factors on Formwork Labour Productivity of Columns

Application of Design Structure Matrix (DSM) for Managing Projects on the Basis of Constructability

Analysis and Measurement of Buildability Factors Affecting Edge Formwork Labour Productivity

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