Construction materials
can be grouped in the following manner:
- Identify materials required and estimate quantity and quality of each material.
- Obtain the approximate unite rate for each item.
- Assess the requirement during the period under consideration, i.e. yearly or project completion basis.
- Determine the usage value of each type by multiplying the quantity required with the corresponding unit rates.
- Calculate the percentage usage value of each material with respect to total project or yearly usage cost. Write this percentage against each item in the approriate column.
- Arrange the items in the descending order of usage value.
- Consider materials in the descending order of usage value. Compute cumulative usage value against each item.
- Draw two horizontal lines demarcating the descending order of the cumulative purchase values at 70% level and 20% level.
