Section: Volume A
Explanation:
5.6.2.1 Variance Analysis
Variance analysis is a technique for determining the cause and degree of difference between the baseline and actual performance. Project performance measurements are used to assess the magnitude of variation from the original scope baseline. Important aspects of project scope control include determining the cause and degree of variance relative to the scope baseline (Section 5.4.3.1) and deciding whether corrective or preventive action is required.

Explanation/Reference:
Reference: http://www.free-management-ebooks.com/faqpm/scope-06.htm

Section: Volume E

Section: Volume C
Explanation:
Process: 6.2 Define Activities
Definition: The process of identifying and documenting the specific actions to be performed to produce the project deliverables.
Key Benefit: The key benefit of this process is to break down work packages into activities that provide a basis for estimating, scheduling, executing, monitoring, and controlling the project work.
Inputs
1. Schedule management plan
2. Scope baseline
3. Enterprise environmental factors
4. Organizational process assets
Tools & Techniques
1. Decomposition
2. Rolling wave planning
3. Expert judgment
Outputs
1. Activity list
2. Activity attributes
3. Milestone list

Section: Volume E