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A single rate method of cost allocation is called such because only one price rate is used in the calculations. There are two types of single rate methods, the floor area (or superficial) method or the functional unit method. The functional unit method estimates cost based on the functional unit s of a project. e.g. for a school the functional unit is a school place, for a hotel the functional unit is a bedroom and so on. The cost is obtained by studying previous similar projects and dividing the total cost by the number of functional units obtained. So if a school cost £5,000,000 and provided 1000 student places the functional unit cost is £5000 per school place.

The superficial method looks at floor area and uses this as its single rate. The price rate used is again based on data taken from similar projects, with similar storey heights. The gross internal floor area (superficial area) is measure and then multiplied by the appropriate rate/m2 to find a cost estimate.

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15y ago

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