TYPES OF ESTIMATES





ESTIMATE

Estimate is the defined as the process of calculating the quantities and cost of various items of works. it  depends on the plan section and elevation

TYPES OF ESTIMATES

1.Approximate estimate
2.Detailed estimate
3.Revised estimate
4.Supplementary estimate
5.Sub estimate
6.Annual maintenance estimate  or repair estimate
7. Complete estimate




1.APPROXIMATE ESTIMATE

Approximate estimate is the simplest one to find out the approximate cost of any structure before its detailed estimate is to be prepared .but only the estimate shown the approximate cost of all the works.

TYPES OF APPROXIMATE ESTIMATE

(1)      Plinth area method
(2)     Cubical content method
(3)     Unit cost method
(4)     Typical bay method
(5)     Carpet area method

PLINTH AREA METHOD

Build up area is measured at the floor level of the basement is called plinth area.
The approximate cost = plinth area of the building x plinth area rate

CUBICAL CONTENT METHOD

The cubical content of the proposed building is worked out and multiplied by the rate per cubical  volume of similar building in the locality.
Cubical content = height of the building

UNIT RATE METHOD

In this estimate is prepared by the multiplying the cost per unit by the number of units in the structure.


TYPICAL BAY METHOD

In this method total area of the structure is equally divided into the number of units.

Approximate cost = no of bays x cost of one bay

DETAILED ESTIMATE

Detailed estimate is the accurate estimate of proposed work. Detailed estimate consists of quantities of all works rate and cost of each item of works. Detailed estimate give exact value of cost and quantities .it accompanied by the abstract , detailed drawings ,data, lead statement and specifications.

REVISED ESTIMATE

Revised estimate is nothing but. It is detailed estimate prepared when the revised quantities and cost of original estimate.

REVISED ESTIMATE IS REQUIRED FOR THE FOLLOWING REASONS

  When  the sanctioned estimate of work exceed by more than 10% of administration approval.

  When  the estimate cost is exceed more than 5 % during execution of work due to increasing thecost 
of material or due alternation of work.

 When  the sanctioned estimate is more than the actual requirement.

SUPPLEMENTARY ESTIMATE

Supplementary estimate is the additional estimate .when the work is in progress some alternations or additional work are to be necessary in that time additional estimate is prepared that is called supplementary estimate.

SUB ESTIMATE

For the major project have several smallest works. The detailed estimate is prepared for each smallest works it is called sub estimate.

ANNUAL MAINTENANCE ESTIMATE OR REPAIR ESTIMATE

It is a detailed estimate to maintain the existing work in maintained in good condition. For like white washing, color washing ,flooring ,old iron works changing etc .that is kept in 2% if capital cost of building.  

COMPLETE ESTIMATE

The total expenditure of a project from beginning to completion of project.
It consists of the followings

 cost of land.
 cost of survey preparation of plan and estimate.
 cost of approval.
 cost of construction.

 cost of electrification etc.

ALSO READ 
MEASUREMENT OF MATERIAL BASED ON IS 1200 REVISED
USEFUL INFORMATION FOR CIVIL SITE ENGINEERS
USEFUL METRIC UNIT AND FPS EQUIVALENT FOR CIVIL ENGINEERS
TYPES OF FOUNDATIONS

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