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IIBA CBDA Exam - Topic 3 Question 17 Discussion

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

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:

Suggested Answer: B

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42 comments · newest first
LA
Laurel 11 months ago
Yup, ROM is the way to go for rough estimates!
CL
Claudia 11 months ago
Sounds right, but I thought Delphi estimates were more common.
GU
Gussie 12 months ago
Wait, how can they be sure about that accuracy?
AD
Adaline 12 months ago
Totally agree, + or - 10% fits the definition!
VI
Virgie 1 year ago
This is definitely a ROM estimate.
AL
Alpha 1 year 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.
CA
Casie 1 year 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.
AL
Aliza 1 year ago
I'm not entirely sure, but I feel like the Delphi method involves expert opinions, which doesn't seem to fit here.
JO
Joesph 1 year ago
I remember we talked about ROM estimates being rough and having a wide range, so I think this could be it.
GE
Georgeanna 1 year 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?
LO
Lou 1 year 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.
KE
Kenia 1 year 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?
DA
Daisy 1 year 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.
CH
Christene 1 year 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.
QU
Quentin 1 year 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.
RE
Refugia 1 year 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.
CH
Chauncey 1 year ago
This looks like a matrix multiplication problem. I'll need to carefully work through the dimensions and operations to determine the correct answer.
SH
Shawna 1 year ago
I'll take the 'definitive estimate' - that sounds like a fancy way of saying 'wild guess'.
MA
Maurine 1 year ago
↳ replying to Shawna
User 3: I agree with Becky, it's definitely A) ROM estimate.
BE
Becky 1 year ago
↳ replying to Shawna
User 2: I'll go with C) Parametric estimate.
WE
Wenona 1 year ago
↳ replying to Shawna
User 1: I think it's A) ROM estimate.
KA
Kami 1 year ago
I bet the analytics team is just throwing darts at a board to come up with these 'estimates'.
FA
Fannie 1 year ago
↳ replying to Kami
C) Parametric estimate
MA
Mabelle 1 year ago
↳ replying to Kami
B) Delphi estimate
DU
Dulce 1 year ago
↳ replying to Kami
A) ROM estimate
TY
Ty 2 years ago
Definitely a definitive estimate! I mean, they've got the data and everything, right? What could go wrong?
DO
Dottie 1 year ago
↳ replying to Ty
D) Definitive estimate
VE
Venita 1 year ago
↳ replying to Ty
C) Parametric estimate
FA
Fatima 1 year ago
↳ replying to Ty
B) Delphi estimate
CA
Casie 1 year ago
↳ replying to Ty
A) ROM estimate
TH
Thurman 2 years 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?
IR
Irma 2 years ago
This has to be a Delphi estimate. They debated the accuracy, which is the key characteristic of the Delphi method.
AR
Arlie 1 year ago
↳ replying to Irma
D) Definitive estimate
FL
Flo 2 years ago
↳ replying to Irma
C) Parametric estimate
GE
Georgeanna 2 years ago
↳ replying to Irma
B) Delphi estimate
HE
Hershel 2 years ago
↳ replying to Irma
A) ROM estimate
CY
Cyril 2 years 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.
AR
Arthur 2 years ago
↳ replying to Cyril
I think it's A) ROM estimate because they are providing a rough estimate with a range of +/- 10%.
BO
Bo 2 years ago
↳ replying to Cyril
I agree with you, C) Parametric estimate seems to be the most fitting choice.
SI
Simona 2 years ago
I'm not sure, but I think it could also be a Parametric estimate since they are using data to make the prediction.
CO
Colby 2 years ago
I agree with Leonor, because the range of + or - 10% aligns with a Rough Order of Magnitude estimate.
LE
Leonor 2 years ago
I think it's a ROM estimate.
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