In construction cost estimating and bid preparation, which of the following evaluator questions are relevant for validating the reliability of a project estimate and its risk exposure?
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ADid the estimators precisely evaluate site conditions ?
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BDid the estimators use short cut methods which may be un realistic in their situation ?
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CHow much money will the contractor's risk, loosing if he Were to submit bid on the raw estimate of cost.
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DAll of these
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ENone of these
Answer
Correct Answer: All of these
Explanation
Introduction / Context:Construction estimates underpin competitive bidding, contract negotiation, and project control. A robust estimate must reflect real site conditions, use appropriate methods (not unrealistic shortcuts), and be stress-tested for potential loss exposure if submitted as a bid. This question checks your ability to recognize the full scope of estimator due diligence.
Given Data / Assumptions:
- The estimate will inform a potential bid.
- Site conditions, method selection, and risk evaluation are all critical.
- Management wants to know the downside risk if the raw estimate were used unchanged.
Concept / Approach:
Good estimating practice requires: (1) thorough site reconnaissance and data review; (2) methodical quantity takeoff and validated productivity norms; (3) avoidance of overly simplistic shortcuts; and (4) risk analysis—contingency, sensitivity, and potential loss if the bid price tracks the raw estimate without allowances.
Step-by-Step Solution:
Confirm evaluation of site conditions (geology, access, utilities, weather) because they affect production rates and costs.Scrutinize whether any shortcut method was used outside its valid range, jeopardizing accuracy.Quantify downside risk: estimate probable loss if the bid equals the unadjusted raw cost and adverse events occur.Since all three are essential checks, select the inclusive option.Verification / Alternative check:
Peer reviews and estimate risk workshops routinely ask these very questions to validate estimates before bid approval gates.
Why Other Options Are Wrong:
- Any single item alone is incomplete; estimates fail when one dimension is ignored.
- 'None of these' contradicts standard estimating governance.
Common Pitfalls:
- Assuming past means and methods apply unchanged to the new site.
- Ignoring schedule risks that inflate costs even if quantities are correct.
Final Answer:
All of these