When using the assemblies method for cost estimating, which level of project development is most appropriate?
Correct Answer
C) Design development phase
The assemblies method is most effective during design development when building systems are defined but detailed specifications may not be complete. It provides more accuracy than square foot pricing while requiring less detail than unit cost estimates.
Why This Is the Correct Answer
CORRECT_ANSWER - The assemblies method is most appropriate during the design development phase because this is when building systems and major components are clearly defined, but detailed specifications and drawings are not yet complete. This method allows for reasonably accurate cost estimates based on building assemblies (like wall systems, roofing systems, etc.) without requiring the detailed unit pricing that comes later. It bridges the gap between early conceptual estimates and detailed unit cost estimates.
Why the Other Options Are Wrong
Option A: Conceptual design phase
The conceptual design phase is too early for assemblies method because building systems and components are not yet defined in sufficient detail. At this stage, square footage or cubic footage methods are more appropriate.
Option B: Schematic design phase
The schematic design phase typically still lacks the detail needed for assemblies method. While basic building layouts are established, the specific systems and assemblies are not sufficiently defined for this estimating approach.
Option D: Construction documents phase
The construction documents phase provides too much detail for assemblies method - at this stage, detailed unit cost estimates are more appropriate and accurate since all specifications, materials, and methods are fully defined.
Memory Technique
Think 'DD = Defined Systems' - Design Development is when systems are Defined, making it perfect for assemblies (system-based) estimating.
Reference Hint
Look for cost estimating methods in the project management or construction administration sections, typically covering the relationship between design phases and appropriate estimating techniques.
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