A given schedule activity is most likely to last four weeks. In a best-case scenario, the schedule activity is estimated to last two weeks. In a worst-case scenario, the schedule activity is estimated to last 12 weeks.
Given these three estimates, what is the expected duration of the activity?

• A.Three weeks
• B.Four weeks
• C.Five weeks
• D.Six weeks

Correct Answer: C

Explanation/Reference:
Explanation:
6.5.2.4 Three-Point Estimating
The accuracy of single-point activity duration estimates may be improved by considering estimation uncertainty and risk. This concept originated with the program evaluation and review technique (PERT).
PERT uses three estimates to define an approximate range for an activity's duration:
Most likely (tM). This estimate is based on the duration of the activity, given the resources likely to be

assigned, their productivity, realistic expectations of availability for the activity, dependencies on other participants, and interruptions.
Optimistic (tO). The activity duration based on analysis of the best-case scenario for the activity.

Pessimistic (tP). The activity duration based on analysis of the worst-case scenario for the activity.

Depending on the assumed distribution of values within the range of the three estimates the expected duration, tE, can be calculated using a formula. Two commonly used formulas are triangular and beta distributions.
The formulas are:
Triangular Distribution. tE = (tO + tM + tP) / 3

Beta Distribution (from the traditional PERT technique). tE = (tO + 4tM + tP) / 6

Duration estimates based on three points with an assumed distribution provide an expected duration and clarify the range of uncertainty around the expected duration.
Formula:
E = (a + 4m + b) / 6
Application:
(2+ (4*4) +12)=30 /6 =5

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Which input to the Identify Stakeholders process provides information about internal or external parties related to the project?

• A.Stakeholder register
• B.Project charter
• C.Procurement documents
• D.Communications plan

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Directing another person to get from one to another using a known set of expected behaviors are the ability to lead a team and inspire them to do their jobs well is related to?

• A.Influence and challenge
• B.Innovation and administration
• C.Leadership and management
• D.Engagement and guidance

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Why is tailoring required in a project?

• A.Because a one-size-fits-all approach avoids complications and saves time
• B.Because every project is unique and not every tool, technique, input, or output identified in the PMBOK Guide is required
• C.Because tailoring allows us to identify the techniques, procedures, and system practices used by those in the project
• D.Project managers should apply every process in the PMBOK Guide to the project, so tailoring is not required

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What does a CPI value greater than 1.0 indicate?

• A.Cost right at the estimated value
• B.Cost under the estimated value
• C.Cost right at the actual value
• D.Cost over the estimated value

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