Section: Volume E
Explanation:
7.3.2.4 Historical Relationships
Any historical relationships that result in parametric estimates or analogous estimates involve the use of project characteristics (parameters) to develop mathematical models to predict total project costs. Such models may be simple (e.g., residential home construction is based on a certain cost per square foot of space) or complex (e.g., one model of software development costing uses multiple separate adjustment factors, each of which has numerous points within it).
Both the cost and accuracy of analogous and parametric models can vary widely. They are most likely to be reliable when:
Historical information used to develop the model is accurate,

Parameters used in the model are readily quantifable, and

Models are scalable, such that they work for large projects, small projects, and phases of a project.

Process: 7.3 Determine Budget
Definition: The process of aggregating the estimated costs of individual activities or work packages to establish an authorized cost baseline.
Key Benefit: The key benefit of this process is that it determines the cost baseline against which project performance can be monitored and controlled.
Inputs
1. Cost management plan
2. Scope baseline
3. Activity cost estimates
4. Basis of estimates
5. Project schedule
6. Resource calendars
7. Risk register
8. Agreements
9. Organizational process assets
Tools & Techniques
1. Cost aggregation
2. Reserve analysis
3. Expert judgment
4. Historical relationships
5. Funding limit reconciliation
Outputs
1. Cost baseline
2. Project funding requirements
3. Project documents updates

Explanation/Reference:
Explanation:
6.6.2.3 Critical Chain Method
The critical chain method (CCM) is a schedule method that allows the project team to place buffers on any project schedule path to account for limited resources and project uncertainties. It is developed from the critical path method approach and considers the effects of resource allocation, resource optimization, resource leveling, and activity duration uncertainty on the critical path determined using the critical path method. To do so, the critical chain method introduces the concept of buffers and buffer management. The critical chain method uses activities with durations that do not include safety margins, logical relationships, and resource availability with statistically determined buffers composed of the aggregated safety margins of activities at specified points on the project schedule path to account for limited resources and project uncertainties. The resource-constrained critical path is known as the critical chain.

Explanation/Reference:
Explanation:
4.1.2.1 Expert Judgment
Expert judgment is often used to assess the inputs used to develop the project charter. Expert judgment is applied to all technical and management details during this process. Such expertise is provided by any group or individual with specialized knowledge or training and is available from many sources, including:
Other units within the organization,

Consultants,

Stakeholders, including customers or sponsors,

Professional and technical associations,

Industry groups,

Subject matter experts (SME), and

Project management office (PMO).

Process: 4.1. Develop Project Charter
Definition: The process of developing a document that formally authorizes the existence of a project and provides the project manager with the authority to apply organizational resources to project activities.
Key Benefit: The key benefit of this process is a well-defined project start and project boundaries, creation of a formal record of the project, and a direct way for senior management to formally accept and commit to the project.
Inputs
1. Project statement of work
2. Business case
3. Agreements
4. Enterprise environmental factors
5. Organizational process assets
Tools & Techniques
1. Expert judgment
2. Facilitation techniques
Outputs
1. Project charter