Which structure shows resources categorized by type and then by individual resources?

• A. Resource Breakdown Structure (RBS)
• B. Resource Histogram
• C. Cost Breakdown Structure
• D. Resource Allocation Matrix

Answer: (A)

Resource Breakdown Structure is a hierarchical way to list all project resources, starting with broad resource types (such as labor, material, equipment) and then naming the specific resources within each type. This two-level organization makes it clear what kind of resources are needed and exactly which individual resources will be used, which supports planning, procurement, and tracking. It contrasts with a resource histogram, which is a time-based view of how many resources are needed, a cost breakdown structure that focuses on costs by category rather than resources, and a resource allocation matrix that maps resources to activities without organizing them first by type and then by resource.