In regard to estimation and costing, the accurate estimate in which the quantity of each item of work is calcu

Question

In regard to estimation and costing, the accurate estimate in which the quantity of each item of work is calculated is called ___________.

Examoogle · Accepted Answer

The correct answer is Option A: detailed estimate. A detailed estimate is the most precise form of estimation, where the quantities of all individual items of work are calculated accurately from drawings and specifications. It serves as the basis for inviting tenders and executing the project.

Step-by-Step Solution & Concepts:
A detailed estimate is the most precise form of estimation, where the quantities of all individual items of work are calculated accurately from drawings and specifications. It serves as the basis for inviting tenders and executing the project.

Working Principle: It involves a systematic breakdown of the construction process into distinct work items (e.g., excavation, brickwork, concrete). The quantities are derived using detailed dimension sheets based on architectural and structural blueprints. Once quantities are determined, they are multiplied by current schedule of rates ($SR$) to arrive at the final cost.

Key Formulas: $	ext{Total Cost} = \sum (	ext{Quantity} 	imes 	ext{Unit Rate}) + 	ext{Contingencies} + 	ext{Work Charged Establishment}$

Key Points: It is prepared after the final approval of designs and structural drawings.; It includes detailed reports, specifications, and measured drawings.; It provides a clear picture of the expenditure expected at each stage of construction.; The total estimate usually includes a provision for $3-5\%$ for contingencies.

Advantages: High accuracy in financial planning.; Facilitates precise inventory and material procurement.; Essential for legal contracts and bidding.

Disadvantages: Requires substantial time and effort to prepare.; Needs highly skilled personnel for accurate measurement.; Cannot be prepared in the preliminary stages of a project.

Applications: Government tendering and contract finalization.; Detailed budget allocation for construction projects.; Monitoring actual project expenditure against estimates.

Additional Info: Approximate/Rough estimates (Option B and D) are used only for preliminary budget approval or administrative sanction.. Supplementary estimates are prepared when there is a significant deviation or addition to the original work during construction.

Answer: A is correct — Detailed estimate is the precise calculation of quantities for every item of work based on final architectural and structural drawings.

Exam Tip: Remember: Approximate estimates (like Plinth Area or Cubic Rate methods) are used for feasibility studies, while detailed estimates are mandatory for technical sanction and tendering.

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Option B: approximate estimate

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Option C: supplementary estimate

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Option D: rough estimate

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