BOQ ( Billing Of Quantity ) Basic Information about Bill of Quantity
Description column provides a brief explanation of what to be done. For example, in the first item, the 32mm diameter CPVC pipes should be laid for cold water services in 20 bar operating pressure. Specification & drawingare other two important items to be analyzed in detail for clear understanding. Here the term engineer means the consultant for the project.
THE IMPORTANCE OF BOQ
BOQ shall be used in every phase (pre-contract & post-contract) of the project but need of BOQ differs based on different contract agreements & project. The major usages are listed below.
It provides basic idea of the project by giving the quantities to tenderers.
It defines the extent of the work. (But it should be identified in line with drawings & specification as well).
It gives estimated or anticipated contract sum. (very important to client)
It provides a basis for valuation of variation. (Variation is to be discussed in detail).
THE MAJOR PARTS OF BOQ
Parts of BOQ can be varied according to the project size as well the practices. Generally it has measured works, Preliminaries & Provisional sums. The contract sum would be addition of these three items.
In construction industry, preliminaries is known as the indirect cost for execution of project but these are the costs which is very much vital for the construction activities. The reason for these cost mentioned separately is it is very difficult to distribute these cost amongst with measured works. The examples for preliminaries listed below.
Charges for performance bond, advance payment guarantee & Workmen compensation
Maintenance of the site clean
Requirement of site office, site stores & staff accommodation.
Cost towards the project management staff (QS, Project Manager, Engineering professionals)
Charges for drawings & safety
From the above mentioned examples, it can be understood these costs cannot be distributed to work item but without these expenses there will be no project.
It is the actual or estimated work will be carried out to complete the project. The works have been measured in different units. They are liner meter, square meter, cubic meter, number, item & etc. Value of measured works will be calculated by multiplication of quantities and rate.
It is the sum which is allocated for the undersigned works at the tender time. It will be adjusted after the execution of the project.
In summary BOQ is very much important for the commercial management purposes. It should be understood by every construction professional to deliver a quality and expected product to client. In other words to provide value for money.
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