Mumbai University > CIVIL > Sem 7 > Quantity survey, Estimation and valuation

Marks: 4 M

Year: May 2014

Revised Estimate:

1. This is required when the sanctioned amount is exceeded due to change of rates or addition of works fairly dependent on the work at first sanctioned. So, a revised estimate is due to material deviation from the original proposal.
2. It is accompanied with a comparative statement abtract from showing the probable variations for quantity, rate and amount against each item of work involved in the project.
3. Revised estimate is required due to change of rate or quantity of materials so no additions or revision of drawings is necessary.

Supplementary Estimate:

1. This is required due to supplementary works which are fairly independent of the work at first sanctioned. So, supplementary estimate is due to material deviation of a structural nature from the design originally approved.
2. No comparative abstract form is required. This is an estimate for additional works only. The abstract shows the original estimate and total amount of the sanction required including supplementary amount.
3. Supplementary estimate is required due to some new works or due to change of design, so additions or revisions of drawings may be necessary.