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6.4.3 Estimate Activity resources: outputs

6.4.3.1 Activity resource requirements

Activity resource requirements identify the types and quantities of resources required for each activity in a work
package. These requirements then can be aggregated to determine the estimated resources for each work package
and each work period. The amount of detail and the level of specificity of the resource requirement descriptions
can vary by application area. The resource requirements documentation for each activity can include the basis of
estimate for each resource, as well as the assumptions that were made in determining which types of resources 6
are applied, their availability, and what quantities are used.

6.4.3.2 resource Breakdown Structure

The resource breakdown structure is a hierarchical representation of resources by category and type. Examples
of resource categories include labor, material, equipment, and supplies. Resource types may include the skill level,
grade level, or other information as appropriate to the project. The resource breakdown structure is useful for
organizing and reporting project schedule data with resource utilization information.

6.4.3.3 Project documents updates

Project documents that may be updated include, but are not limited to:

• Activity list,

• Activity attributes, and
• Resource calendars.

6.5 Estimate Activity durations

Estimate Activity Durations is the process of estimating the number of work periods needed to complete
individual activities with estimated resources. The key benefit of this process is that it provides the amount of time
each activity will take to complete, which is a major input into the Develop Schedule process. The inputs, tools and
techniques, and outputs of this process are depicted in Figure 6-14. Figure 6-15 depicts the data flow diagram of
the process.

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