CBAP · Question #276
You are the business analyst for a large project for your organization. Your project has 65 stakeholders and this will greatly increase the complexity of the communication in this project. To…
The correct answer is A. 2080. The number of communication channels in a project is calculated with the formula n(n-1)/2, which yields 2080 channels for 65 stakeholders.
Question
You are the business analyst for a large project for your organization. Your project has 65 stakeholders and this will greatly increase the complexity of the communication in this project. To demonstrate how complex this project and its communication will be, you show the management the number of communication channels in this project. How many channels exist in this project based on the number of stakeholders?
Options
- A2080
- B4160
- C4225
- D65
How the community answered
(56 responses)- A77% (43)
- B7% (4)
- C4% (2)
- D13% (7)
Why each option
The number of communication channels in a project is calculated with the formula n(n-1)/2, which yields 2080 channels for 65 stakeholders.
The standard communication channels formula from the PMBOK is n(n-1)/2, where n is the total number of stakeholders. With 65 stakeholders the calculation is 65 x (65-1) / 2 = 65 x 64 / 2 = 4160 / 2 = 2080 channels. This formula is used in project management to demonstrate how dramatically communication complexity scales with stakeholder count, supporting the need for formal communication planning.
4160 is the result of computing n(n-1) without dividing by 2, which incorrectly counts every communication link twice instead of counting each unique channel once.
4225 is the result of computing n squared (65 x 65), which does not reflect the actual number of unique pairwise communication paths between stakeholders.
65 is simply the raw count of stakeholders and does not represent the number of communication channels that exist between them.
Concept tested: Communication channels formula n(n-1)/2 in project management
Source: https://www.pmi.org/pmbok-guide-standards/foundational/pmbok
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