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In which type of estimation work completed in parts?
Approximate
Scientific
Approximate
Approximate estimation is a process used in the early stages of a project to determine the cost and scope by dividing the total work into discrete, identifiable parts or sub-phases. This method provides a preliminary budget and timeline before the detailed final estimate is prepared based on comprehensive architectural or engineering drawings.
Approximate estimation is a process used in the early stages of a project to determine the cost and scope by dividing the total work into discrete, identifiable parts or sub-phases. This method provides a preliminary budget and timeline before the detailed final estimate is prepared based on comprehensive architectural or engineering drawings.
TotalCost=тИСi=1nтАЛ(AreaiтАЛ├ЧRateiтАЛ) тАФ estimation of cost based on sum of parts
PeтАЛ=n1тАЛтИСj=1nтАЛVjтАЛ тАФ average estimation value based on past project components
The principle relies on 'Plinth Area' or 'Cubical Content' estimation techniques where historical data from similar projects is used. The work is segmented into structural components, service systems, and finishing works, each calculated as a percentage or part of the total project value to yield a quick, rough estimate.
Used for preliminary budget approval by administrative authorities.
Calculated using Plinth Area Rate or Cubical Content method.
Completion in parts helps in financial allocation for different departments.
Subject to significant variations compared to detailed estimates.
Rapid generation of budget requirements.
Facilitates quick feasibility studies and financial planning.
High probability of error compared to detailed methods.
Not suitable for procurement and material ordering.
Initial project budget planning.
Government administrative approval processes.
Early stage cost-benefit analysis.
| Feature | Approximate | Scientific/Detailed |
|---|---|---|
Accuracy | Low | High |
Basis | Historical Data | Detailed Drawings/Specs |
Scientific estimation is a synonym for 'Detailed Estimation', which involves precise calculation of exact quantities (Q) and market rates (R) using the formula Total=тИС(Q├ЧR).
Option B (Scientific) is incorrect because scientific/detailed estimation calculates the total project cost holistically based on technical specifications, rather than breaking it into parts for early-stage estimation.
A is correct тАФ Approximate estimation involves dividing project work into functional or structural parts to determine a preliminary cost.
In competitive exams, always link 'Approximate' to 'Preliminary/Rough' and 'Detailed/Scientific' to 'Final/Accurate'.