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# TOPIC: Q: about Beta & Triangular

## Q: about Beta & Triangular 6 years 5 months ago #10222

 LH Topic Author Visitor Could someone please help me ... How do we know when to use these formulas: a) Beta = (Pessimistic + (4 * Most Likely) + Optimistic) / 6 b) Triangular = (Pessimistic + Most Likely + Optimistic) / 3 I know that the first formula (a) used for weighted average, but how can we recognize if the given information in the question is for weighted average? Thanks. Your e-mail address will never be displayed on the site. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.

## Q: about Beta & Triangular 6 years 5 months ago #10314

 Christian Winter Offline Junior Boarder Posts: 24 Karma: 1 Thank you received: 5 In case the estimates were made with no real experience and are more best guesses use the triangular. But when there is already experience from similar previous projects or experts are doing the estimates you should use the beta distribution . Is there such information in the question about the "quality" of the estimates? Your e-mail address will never be displayed on the site. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.

## Q: about Beta & Triangular 6 years 5 months ago #10355

 Steven Mudrinich, PMP Offline Expert Boarder Posts: 126 Karma: 7 Thank you received: 25 I know this may seem vague, but on the exam it will be readily apparent as to which formula to use. You should be fine! -Steven Comprehensive PMP Study Guide: www.amazon.com/Setting-Your-Exam-Study-P...rds=steven+mudrinich Your e-mail address will never be displayed on the site. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.

## Q: about Beta & Triangular 6 years 4 weeks ago #11751

 Anonymous Topic Author Visitor Hi Steven, If the question does not give any hint or if nothing other than the values of P,M,O are specified, then by default, do we use PERT or do we use Triangular? Your e-mail address will never be displayed on the site. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.

## Q: about Beta & Triangular 5 years 10 months ago #12363

 Anonymous Topic Author Visitor Well, I got both results as answers in both questions that I had. During my preparation it was only one correct answer from either one of the two. while on the actual exam, both results appeared so who knows if I got it right... Your e-mail address will never be displayed on the site. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.

## Q: about Beta & Triangular 5 years 10 months ago #12364

 Anonymous Topic Author Visitor Did you get the answer for that? That's what I got twice on the exam. I used the regular one and who knows if I got it right. Your e-mail address will never be displayed on the site. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.

## Q: about Beta & Triangular 5 years 10 months ago #12476

 Nicole McIntyre Topic Author Visitor I am also confused about how to know when to use which version. In taking the post-test quiz for Lesson 6, Question 8 gives both the triangular and Beta answers as options. I went with triangular because it didn't indicate to me that a weighted average was required. Am I supposed to assume, as someone said before, that because there is a "policy" and previous observations regarding the time required, that a beta distribution is more appropriate? Would a triangular distribution only be appropriate if the question basically said, "we've never done this before and are taking a wild stab in the dark?" Your e-mail address will never be displayed on the site. Check this box to be notified of replies to this topic. Note: BBcode and smileys are still usable.
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