B.Q. - Bills of Quantities
Yes, a major part of the work of a QS is the preparation of BQ. In fact this is probably the main reason for the existence of the QS profession. The BQ is part of the tender document which gives a very detailed breakdown of the construction works into small items. In construction, the items are usually listed mainly according to trades e.g. piling, reinforced concrete works, rooof, brickwork, dooors, windows, finishes, etc. Based on drawings provided by the architect and engineer, the QS does the 'taking off of quantities'. For r.c. works for example, the QS works out the volume of concrete, quantity of each type of steel bars, quantity of formwork, etc. The calculations involved are quite simple really - calculation of area, volume, length, weight etc. The levels of maths involved is up to Form 5 the most I'd say. To be able to do this, obviously one needs to be able to read the drawings and should be well versed with construction, how a building is constructed and the sequence of work. It involves a lot of detailed paper work, not a job which require any creativity. QS produces tonnes of paperwork but they don't do any drawings.
With the detailed breakdown of the works into various items, the tenderers/building contractors who bid for the job can then put their prices and come up with the total cost for the whole construction. The BQ provides a uniform basis for pricing the works which is fair to both the contractor and the Owner.
There are construction projects which are carried out without a QS especially smaller scale projects. They are called 'lump sum contracts' which are based on the drawings and specifications from the Architect and Engineer. Without a detailed breakdown, the risk of disputes occurring in the course of construction is higher since there is bound to be items left out which gives the opportunity for the contractor to claim for extra.
Apart from preparing BQ and tender, the QS also does the following:
- prepare preliminary estimate of the cost of the work during the early stage of the project - planning and design stages
- preparing report on the tenders received and making recommendation to the Owner
- making assessment of the value of the works under construction so that payment can be made to the contractor(by the owner. For construction projects, huge amount of money is involved and the contractors are normally paid as the work progresses, usually on a monthly basis.
- assessing claims for contractors for variations i.e. additional work and omissions from the contract.
- preparing the final account of the work upon completion.
In a nutshell, the QS is like an building accountant to the owner, basically looking after the owner's interest in ensuring that the money is well spent and helps to control the cost of a building project.
QS also work for building contractors to tender for projects. They work out the prices and tender for building projects. During construction, they submit claim for progress payment of the works to the architect/QS.
The QS have their professional institute like the architects have PAM. The surveying institute covers various branches of surveying including land surveying, building surveying, etc which are really quite unrelated professions.
http://www.ism.org.my/index.php?option=com...id=12&Itemid=16
This post has been edited by tehtmc: Mar 30 2010, 09:27 PM
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