When preparing a detailed cost estimate for a commercial project, which cost estimating method provides the most accurate results?
Correct Answer
B) Detailed quantity takeoff with current pricing
Detailed quantity takeoff with current pricing provides the most accurate estimates because it involves measuring exact quantities of materials and labor required and applying current market prices to each item.
Why This Is the Correct Answer
Detailed quantity takeoff with current pricing is the most accurate estimating method because it involves physically measuring and calculating the exact quantities of every material, labor hour, and equipment needed for the project. This method uses current market prices for each specific item rather than historical averages or assumptions. It accounts for the unique characteristics of each project and eliminates the guesswork inherent in other estimating methods. The accuracy comes from the granular level of detail and real-time pricing data.
Why the Other Options Are Wrong
Option A: Assemblies method with unit costs
The square foot method using historical data is less accurate because it relies on average costs per square foot from past projects, which may not reflect current market conditions or the specific complexities of the current project.
Option C: Parametric estimating based on similar projects
The assemblies method with unit costs is more accurate than square foot estimating but still less precise than detailed takeoffs because it groups items into assemblies rather than measuring each individual component separately.
Option D: Square foot method using historical data
Parametric estimating based on similar projects uses mathematical relationships and historical data from comparable projects, but it cannot account for the unique specifications and current market conditions of the specific project being estimated.
Memory Technique
Think 'DETAIL = ACCURATE' - Detailed takeoff gives you the exact recipe with current ingredient prices, while other methods are like estimating a meal cost without knowing exactly what's in it.
Reference Hint
Florida Building Code - Administrative Chapter 1, Section on Construction Documents and Cost Estimating Standards
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