What is the primary advantage of using the assemblies cost estimating method over the detailed method for preliminary estimates?
Correct Answer
B) It requires less time and detailed information while maintaining reasonable accuracy
The assemblies method groups related components together, allowing for faster estimates with reasonable accuracy when detailed drawings aren't available. It balances speed with accuracy for preliminary estimates.
Why This Is the Correct Answer
The assemblies cost estimating method's primary advantage is its efficiency in producing reasonably accurate estimates without requiring extensive detailed information. This method groups related building components (like wall assemblies including framing, insulation, drywall, etc.) into single units, allowing estimators to quickly calculate costs during preliminary phases when complete drawings and specifications aren't available. It strikes an optimal balance between the speed needed for early project phases and the accuracy required for meaningful cost projections.
Why the Other Options Are Wrong
Option A: It provides more accurate material quantities
The assemblies method actually provides less detailed material quantities compared to the detailed method. While it gives reasonable accuracy for preliminary estimates, the detailed method breaks down every individual component and material, resulting in more precise quantities.
Option C: It eliminates the need for contingency allowances
The assemblies method does not eliminate the need for contingency allowances. Contingencies are still necessary to account for unforeseen conditions, design changes, and market fluctuations regardless of the estimating method used.
Option D: It automatically includes all labor productivity factors
The assemblies method does not automatically include all labor productivity factors. Labor productivity must still be considered and adjusted based on project-specific conditions, crew experience, weather, and site conditions regardless of the estimating method employed.
Memory Technique
Think 'FAST Assembly line' - assemblies method is FAST but still maintains quality (reasonable accuracy) for preliminary estimates.
Reference Hint
Look up cost estimating methods in construction management or estimating chapters, typically found in project management sections of contractor reference materials.
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