Labour Productivity Measurement Method for Malaysian Housing Industry
The industrialised building system (IBS) was introduced in Malaysia in 1966, but it failed to establish itself though there is a sustained large market for residential projects. One of the main reasons behind this failure is a lack of scientific data on labour productivity in the construction ind...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
2005
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/7078/1/FK_2005_41%28a%29.pdf |
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| Summary: | The industrialised building system (IBS) was introduced in Malaysia in 1966, but it
failed to establish itself though there is a sustained large market for residential projects.
One of the main reasons behind this failure is a lack of scientific data on labour
productivity in the construction industry. Hence, the objective of this study is to
establish a labour productivity measurement method for the Malaysian housing
construction industry. Labour productivity (manhours/m2) is defined as the manhours
(the multiplication of number of workers and work time) required to complete a
structural element of a house. Two data collection methods were used to collect the
labour productivity data, namely time study on-site observation (ideal labour
productivity) and survey questionnaire (actual and pre-planned labour productivity).
For the time study on-site observation method, a total of 499 ideal labour productivity
data were obtained from seven residential projects constructed between January 2003
and April 2004. Results indicated that the mean ideal labour productivity for
conventional building system was 4.20 manhours/m2 followed by cast in-situ table form 2.70 manhours/m2), cast in-situ tunnel form (1.88 manhours/m2) and precast concrete
system (1.33 manhours/m2). The mean cycle time measured in days for conventional
building system, cast in-situ table form system, cast in-situ tunnel form and precast
concrete systems were 4.93, 3.91, 2.90 and 2.3 1 days respectively. The mean crew size
for conventional building system was 24 workers while for IBS was 22 workers. The
subsequent analysis developed the ideal labour productivity measurement method using
multiple regression analysis. The results indicated that the independent variables,
namely type of building system, crew size, gross building floor area and floor level have
significant impact on ideal labour productivity with coefficient of determination, R~ of
82.1%.
A total of 102 respondents which included 72 contractors, 19 consultants and 1 1
developers responded to the survey questionnaire. The data obtained from the
questionnaire were actual labour productivity data from actual residential projects and
pre-planned labour productivity from hypothetical projects. The results indicated that
the mean actual labour productivity for conventional building system was 7.00
manhours/m2 compared to IBS of 2.10 manhours/m2 while the mean pre-planned labour
productivity for conventional building system was 7.40 manhours/m2 compared to IBS
of 2.13 manhours/m2. Finally, the factors causing the gaps between actual and ideal
labour productivity were established and ranked. |
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