Exam CTFL v4.0 topic 1 question 8 discussion

Actual exam question from ISTQB's CTFL v4.0

Question #: 8
Topic #: 1

You are working on calculating the estimation for a project. You have been given the following numbers by your manager, who is considered to be an expert in estimation:

Optimistic = 35 days -

Likely = 40 days -

Pessimistic = 65 days -
Apply the three-point estimation technique, what is the proper expression of the final estimate?

A. E is 46.3 days, SD = 35
B. E is 40 days, SD = 6.67
C. E is 37.3 days, SD = 43.3
D. E is 43.3 days, SD = 5

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Suggested Answer: D 🗳️

by PAKO1333 at June 10, 2024, 1:31 p.m.

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Edith200

10 months, 2 weeks ago

D is correct: (35+(4*40)+65)/6=43.33 (65-35)/6=5

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matace

1 year ago

Three-point estimate = [(O+4R+P)/6] In the formula, O represents the optimistic estimate, R represents the realistic estimate, and it receives a weight of 4. P is the pessimistic estimate.

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PAKO1333

1 year ago

SD = L-O/6

upvoted 1 times

PAKO1333

1 year ago

Sorry, it's correct . The formula is Pessimistic - Optimistic / 6

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