According to the PMBOK® Guide, the Estimate Activity Resources process involves estimating the types and quantities of material, human resources, equipment, or supplies required to perform each activity.
To perform this accurately, the project manager must know when specific resources are available.
Resource Calendars: This is a critical input to this process. It identifies the working days and shifts on which each specific resource is available. This includes information on which resources (such as human resources, equipment, and material) are potentially available during a planned activity period.
Other Key Inputs:
Project Management Plan: Specifically the Resource Management Plan.
Project Documents: Such as the Activity List and Activity Attributes.
Enterprise Environmental Factors (EEF): Such as resource location and availability.
Organizational Process Assets (OPA): Such as policies and procedures for staffing.
Analysis of Other Options:
A. Activity resource requirements: This is the primary output of the Estimate Activity Resources process, not an input.
B. Published estimating data: This is a tool and technique (specifically part of Data Analysis or expert judgment sources) used to help determine the estimates, though in some versions it is listed under EEFs. However, it is not a primary process input like the calendar.
D. Resource breakdown structure (RBS): This is an output of this process. It is a hierarchical representation of resources by category and type.
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