IIBA CBDA Exam - Topic 3 Question 17 Discussion

Actual exam question for IIBA's CBDA exam

Question #: 17
Topic #: 3

The analytics team has been asked to provide an estimate of the number of customers they expect to have in 12 months. They debated how accurate that figure needs to be and determined that based on the availability of good data, they could predict within + or - 10%. This is an example of a:

AROM estimate

BDelphi estimate

CParametric estimate

DDefinitive estimate

Show Suggested Answer

Suggested Answer: B

by Clare at Jul 14, 2024, 01:55 PM

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Laurel

7 months ago

Yup, ROM is the way to go for rough estimates!

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Claudia

7 months ago

Sounds right, but I thought Delphi estimates were more common.

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Gussie

7 months ago

Wait, how can they be sure about that accuracy?

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Adaline

7 months ago

Totally agree, + or - 10% fits the definition!

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Virgie

8 months ago

This is definitely a ROM estimate.

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Alpha

8 months ago

I’m confused about the difference between parametric and ROM estimates. I thought parametric was more precise, but this seems like a rough estimate.

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Casie

8 months ago

This question reminds me of a practice one we did on estimating customer growth. I think a + or - 10% accuracy points to a ROM estimate.

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Aliza

8 months ago

I'm not entirely sure, but I feel like the Delphi method involves expert opinions, which doesn't seem to fit here.

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Joesph

8 months ago

I remember we talked about ROM estimates being rough and having a wide range, so I think this could be it.

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Georgeanna

8 months ago

I'm a bit stuck on this one. Is it possible it could be a ROM (rough order of magnitude) estimate since they're only aiming for +/- 10% accuracy? Or does that not quite fit the criteria?

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Lou

8 months ago

Okay, let me think this through. They have good data available and are aiming for a specific level of accuracy, so I'm leaning towards C - Parametric estimate. The key is that they're using a formula or model, not just expert opinion.

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Kenia

8 months ago

Hmm, I'm a little unsure about this one. Is it a Delphi estimate since they're relying on expert judgment to determine the accuracy range? Or is that not quite right?

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Daisy

8 months ago

This seems like a straightforward question. I think the answer is C - Parametric estimate, since they're using a formula or model to predict the number of customers based on available data.

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Christene

9 months ago

I'm pretty confident the answer is C. Parametric estimates use a formula or model to make predictions, which seems to match what they're doing here to estimate the number of customers.

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Quentin

9 months ago

Hmm, I'm a bit unsure about this one. I'll need to think through the key principles of behavior modification to determine the best answer.

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Refugia

9 months ago

Okay, let me see here. The network is 201.148.104.0/21, and it's being subnetted using a /23 mask. I think I know how to solve this, but I want to double-check my work.

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Chauncey

9 months ago

This looks like a matrix multiplication problem. I'll need to carefully work through the dimensions and operations to determine the correct answer.

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Shawna

1 year ago

I'll take the 'definitive estimate' - that sounds like a fancy way of saying 'wild guess'.

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Maurine

12 months ago

User 3: I agree with Becky, it's definitely A) ROM estimate.

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Becky

1 year ago

User 2: I'll go with C) Parametric estimate.

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Wenona

1 year ago

User 1: I think it's A) ROM estimate.

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Kami

1 year ago

I bet the analytics team is just throwing darts at a board to come up with these 'estimates'.

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Fannie

1 year ago

C) Parametric estimate

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Mabelle

1 year ago

B) Delphi estimate

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Dulce

1 year ago

A) ROM estimate

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Ty

1 year ago

Definitely a definitive estimate! I mean, they've got the data and everything, right? What could go wrong?

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Dottie

1 year ago

D) Definitive estimate

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Venita

1 year ago

C) Parametric estimate

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Fatima

1 year ago

B) Delphi estimate

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Casie

1 year ago

A) ROM estimate

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Thurman

1 year ago

Hmm, I'm not sure about this one. Guess I'll just go with my gut and pick A) ROM estimate. Who needs accuracy anyway?

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Irma

1 year ago

This has to be a Delphi estimate. They debated the accuracy, which is the key characteristic of the Delphi method.

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Arlie

1 year ago

D) Definitive estimate

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Flo

1 year ago

C) Parametric estimate

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Georgeanna

1 year ago

B) Delphi estimate

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Hershel

1 year ago

A) ROM estimate

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Cyril

1 year ago

I think the correct answer is C) Parametric estimate. The question mentions they can predict within +/- 10%, which aligns with the definition of a parametric estimate.

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