BCS ISEB-PM1 Exam - Topic 2 Question 99 Discussion

Actual exam question for BCS's ISEB-PM1 exam

Question #: 99
Topic #: 2

[All ISEB-PM1 Questions]

Given the following estimates: Optimistic 3 days, Pessimistic 9 days, and most likely

6 days, what is the PERT weighted average?

A6.1

B6.3

Show Suggested Answer

Suggested Answer: C

by Robt at Jul 05, 2025, 03:32 AM

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Nettie

7 months ago

Yeah, 6.3 sounds about right to me!

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Raul

7 months ago

Wait, are we sure about those numbers?

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Aide

7 months ago

Definitely 6.1 days, right?

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Billy

7 months ago

I think it comes out to 6.3 days!

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Derick

8 months ago

The PERT formula is (O + 4M + P) / 6.

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Reena

8 months ago

I believe the most likely estimate plays a big role in the average, so I’m leaning towards option B, but I need to double-check my calculations.

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Kenneth

8 months ago

I’m a bit confused about how to apply the formula correctly. I feel like I might have mixed up the values.

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Joanna

8 months ago

I remember practicing a similar question where we had to calculate the expected time using PERT. I think the answer might be around 6.3 days.

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Karan

9 months ago

I think the PERT formula is something like (Optimistic + 4 * Most Likely + Pessimistic) / 6, but I'm not entirely sure about the weights.

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Bernardine

9 months ago

I'm pretty confident on this one. The PERT weighted average formula is (Optimistic + 4 * Most Likely + Pessimistic) / 6. Plugging in the values, that gives us (3 + 4 * 6 + 9) / 6 = 6.

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Shawn

9 months ago

Wait, is the formula (Optimistic + 4 * Most Likely + Pessimistic) / 6 or (Optimistic + 4 * Most Likely + Pessimistic) / 6? I'm not totally sure, but I think it's the first one.

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Paz

9 months ago

Okay, I've got this. The PERT weighted average is calculated as (Optimistic + 4 * Most Likely + Pessimistic) / 6. Let's plug in the values and see what we get.

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Azzie

9 months ago

Hmm, this looks like a PERT calculation question. I remember learning about this in class, but I'm a bit fuzzy on the exact formula. I'll need to think it through step-by-step.

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Stephaine

11 months ago

That makes sense, so the answer could be C) 6.

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Kassandra

11 months ago

D) 4? Really? Did someone forget to carry the one or something? I mean, come on, this is basic PERT stuff. I'm going with B) 6.3, no doubt about it.

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Matthew

11 months ago

I'm not sure, but I think the PERT weighted average is calculated by (Optimistic + 4*Most Likely + Pessimistic) / 6.

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Veronika

11 months ago

Wait, was that the Optimistic or the Pessimistic estimate again? Ah, who cares, I'll just pick C) 6 and hope for the best. What could go wrong, right?

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