Quantity Surveying

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Quantity Surveying

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Start date: 2014End date: 2014

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    Assessment of the Factors Affecting Accuracy of Pre-tender Cost Estimate in Kaduna State, Nigeria
    (Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT), 2014-05) Alumbugu, Polycarp Olaku , Wasiu Adeniran Ola-awo Saidu, Ibrahim Abdullahi, Mustapha Muhammed & Abdulmumin Abdulazeez
    Accurate cost estimates are crucial to the effective realisation of construction projects. Researchers have noticed the presence of inherent inaccuracies in the bill of quantities prepared by estimators (Quantity surveyors). This paper aimed at examining the factors affecting accuracy of pre-tender cost estimate in Kaduna state, with a view to improving the predictive ability of clients, consultants, and contractors for better estimating. A total of 66 questionnaires were administered with 35 to consultants (53.03%), 15 to contractors (22.73%) and 16 (24.24%) to clients within Kaduna using the simple random sampling technique. The collected data were analysed using the Relative Importance Index and correlation analysis. The study found out that a statistically significant relationship existed between the clients, consultants, and contractor on the essential factors affecting accuracy of pre-tender cost estimate. It was concluded that: Experience and skill level of the consultants, Project teams experience on the construction type, clear and detail drawings and specification, completeness of cost information, accuracy and reliability of cost information are the most significant factors affecting accuracy of pre-tender cost estimate. It was recommended that Clients should always engage the services of skilled professionals to undertake the consultancy services in cost estimating process.
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    An Analysis of Relationship between Working Height and Productivity of Masonry Workers on Site
    (Civil and Environmen Journal, 2014) Alumbugu, Polycarp Olaku,SAIDU, Ibrahim , Abdullahi Sa’adu Gulma, Wasiu Adeniran Ola-awo Abdulmumin Abdulazeez & Bolaji Suleiman
    The analysed the relationship between working height and productivity of masonry worker on construction site by investigating two project sites. Data were also gathered by observing work activity on site. Time study form was design to record the various elements of the task performed and the time taken to complete each element over a period of observation at both floor levels for a period of six working days. A total of thirty structured questionnaires were administered on the factors affecting workers productivity on construction site. T-test was used to determine the difference between productivity at different level. The research concluded that the factors affecting\workers productivity are: Availability of materials, Weather, Gang size, Enabling environment, Height of work have strongly significant effect on the productivity of workers output on construction sites. A none statistically significant difference existed between the output of block laying at both floor levels but a statistically significant difference existed between the output of concrete work at first suspended floor slab and second suspended floor slab. It was also concluded that the output determined for Block laying was 12m2 /day, Concrete work 19m2 /day and16m2 /day at 1st suspended and 2nd suspended floors respectively. It was recommended that the result of this research should be used to provide information upon which planning, scheduling and cost control of block laying, plastering and concrete works can be carried out.