Identification and Comparative Analysis of Key Parameters Influencing Construction labour productivity of Building Projects in Addis Ababa
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Date
2019-06
Authors
Journal Title
Journal ISSN
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Publisher
Addis Ababa University
Abstract
Construction labour productivity (CLP) is dominant subject matter in the construction sector;
essential cost savings and efficient usage of resources are achieved through high level of labour
productivity. CLP is influenced by various factors and practices (parameters) which are multifaced
and
project
dependent.
Various
studies
have
been
performed
to
determine
the
parameters
that
influence the CLP in developed countries, but much has not been done in the developing
countries. As a result, this study focuses on the identification of the key parameters influencing
CLP from micro to macro level in building projects in Addis Ababa.
The study relies on survey data collected to project managements and trade workers’ respondents
from building constructions in Addis Ababa. Respondents from 14 different grade I contractors
which are actively engaged in building construction in Addis Ababa were involved in data
collection process. A total of 100 surveys, 42 from the project managements and 58 from the
trade group, have been collected.
The results from the study have shown that ―National‖, ―Engineering‖ & ―Project Complexity‖
from the PM survey and ―Location Property‖, ―Equipment & Tools‖ & ―Materials and
Consumables‖ from the trade survey categories have been ranked from first to third respectively
as negatively influencing categories. Whereas ―Foreman Related‖, ―Labour and Crew Related‖
and ―Project Management Practices‖ from the PM survey and ―Foreman Related‖, ―Labour and
Crew Related‖ and ―Equipments and Tools‖ from the trade survey have been ranked from first to
third respectively as positively influencing categories.
The identified top three parameters in negatively influencing CLP are ―Public unrest due to
political, economical or other issues‖, ―There is high inflation rate in Ethiopia‖ & ―Drawings and
specifications are often not complete and require updates‖ from the PM survey respectively and
―Remunerations (salary, benefits) are satisfactory‖, ―Remuneration (salary, bonus and
incentives) are fairly set‖ & ―Materials are not delivered on time to task location‖ from the trade
survey respectively. Whereas the identified top three positively influencing parameters are
―Ethiopia has more young population‖, ―Work operation strategies and system increase
performance of the organization‖, ―Clear goals are given to foreman and crafts‖ from the PM
survey respectively and ―There is a really good cooperation between craftsmen in a crew‖, ―Craftsmen use alcohol and drugs during work hours‖, ―Foreman has the required experience‖
from the trade survey respectively.
The result from the perspective difference analysis have shown that ―There is a shortage of good
transportation equipment (cranes, forklifts)‖, ―Available drawings and specifications are not
readable‖, ―Materials are not delivered on time to task location‖ have been the top three
parameters showing difference in perspective between the two survey groups in negatively
influencing parameters. Whereas ―Crew is experienced and has the necessary competence‖,
―Craftsmen trust in the skills and judgment of their supervisors‖ and ―There is a really good
cooperation between craftsmen in a crew‖ have been the top three in positively influencing
parameters showing difference in perspective.
Description
Keywords
Construction Labour Productivity, Influencing Parameters, Project Management (PM), Trade (crafts) workers