Why is the Fibonacci series used in agile planning poker

0 votes

When estimating the relative size of user stories in agile software development the members of the team are supposed to estimate the size of a user story as being 1, 2, 3, 5, 8, 13, ... . So the estimated values should resemble the Fibonacci series. But I wonder, why?

The description on Wikipedia holds the mysterious sentence:

The reason for using the Fibonacci sequence is to reflect the inherent uncertainty in estimating larger items.

But why should there be inherent uncertainty in larger items? Isn't the uncertainty higher, if we make fewer measurement, meaning if fewer people estimate the same story? And even if the uncertainty is higher in larger stories, why does that imply the use of the Fibonacci sequence? Is there a mathematical or statistical reason for it? Otherwise using the Fibonacci series for estimation feels like CargoCult science to me.

Apr 13, 2022 in PMP by Edureka
• 13,690 points
997 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.

Related Questions In PMP

+1 vote
1 answer
0 votes
0 answers

Why Stories in Agile have fibonacci series as estimates?

All the estimates of sprint stories have ...READ MORE

Apr 13, 2022 in PMP by Edureka
• 13,690 points
463 views
0 votes
0 answers

What is the difference between testing and UAT in agile scrum process?

I have been a QE for 4 ...READ MORE

Apr 18, 2022 in PMP by Edureka
• 13,690 points
553 views
0 votes
0 answers

What is the difference between a User Story and a Feature in Agile terminology?

I guess a feature could be something ...READ MORE

Apr 20, 2022 in PMP by Edureka
• 13,690 points
434 views
0 votes
1 answer
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP