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The Method of Measurement will specify the division of work into categories. In the building industry the division is usually on the basis of different trades, and are generally very detailed. In the engineering industry the division is usually less complex and composite items are used describing the completed construction operation. There is normally a division for preliminary items such as mobilisation, site set up and insurances. In contrast to the remainder of the Methods, preliminary items require large lump sums, in some cases time-related, but with little detail to allow the build-up to the item to be ascertained.
Standard Methods of Measurement have become increasingly more complicated. They give rise to claims for additional payment based on interpretation of the Method. The tendency has been for the Methods to provide detailed sub-division of work and therefore scope for claims based on ambiguities of interpretation, failure to measure the tendered Bills in accordance with the Method and the application of exceptions to measure.
It is important to establish a considerable degree of standardization in the method of preparing the BQ and the units used in them. To achieve this aim, a Standard Method of Measurement is used, the purpose of which can be summarized as follows:
(i) To facilitate pricing by standardizing the layout and content of the BQ,
(ii) To provide a systematic structure of bill items, leading to uniform itemization and descriptions,
(iii) To provide a rational system of billing suitable for both manual and computer operation,
(iv) To simplify the measurement of works and the administration of contracts,
(v) To provide a uniform basis for measuring the works so as to avoid misunderstanding and ambiguities, and
(vi) To assist in the financial control of the works.
No. Standard Method of Measurement is just the guideline how construction works should be described and in what way they should be measured.
It is recommended that the SMM to be followed in order to provide standard framework for measuring the construction works but it is not a must.
