Hours ∝ Story Points
(Scrum Planning Meeting)
Senior Programmer: Are those Scrum poker cards I see?
Junior Programmer: Why, yes.
Senior Programmer: Very Nice. A full deck?
Junior Programmer: Yep, Fibonacci from 1 to 34.
Senior Programmer: Do you like magic tricks?
Junior Programmer: Sure!
Senior Programmer: Now these are just story points right? Not hours?
Scrum Master: We only do story points here, never hours!
Senior Programmer: Very good! OK, pick a card and before your very eyes, I'll turn the number on that card into hours.
Scrum Master: Impossible, they don't equate. Apples to Oranges. In Scrum we don't do time estimates.
Senior Programmer: Have you picked your card?
Junior Programmer: Yep, it's the number 2.
Senior Programmer: (taking the card in one hand) Okay! Now I only need three things from you my good Scrum Master. The team size, the sprint length and the team velocity.
Scrum Master: You know all that. Two programmers, 2 week sprints, and 20 points/sprint.
Senior Programmer: Very good. Watch me closely now at the whiteboard. I'm going to do what no magician ever does and show you precisely how my trick works.
(Writes: "2 team members X 40 hours/week X 2 weeks/sprint = 160 hours/sprint")
Scrum Master: (His expression changes from amusement to irritation)
Senior Programmer: OK, we are almost done now, watch closely.
(Below the first line he writes "160 hours/sprint / 20 points/sprint = 8 hours/point")
Scrum Master: OK, now I think our planning meeting is starting to get off track.
Senior Programmer: But we're almost done! (Holding up the Scrum poker card with the number 2 on it) Now tell me dear programmer, what is the number on your card?
Junior Programmer: It's still a 2.
Senior Programmer: And the number on the board here, what does that say?
Junior Programmer: 8 hours/point.
Senior Programmer: multiplying them together?
Junior Programmer: 16..
Senior Programmer: Hours! 16 Hours! Magically, we’ve transformed your story point estimate into hours. The Scrum Master said it couldn't be done! “Story points have nothing to do with hours”, he said.
Well, It appears we have done the impossible!
Now let's see how well you have learned my trick. How about 1 story point?
Junior Programmer: 8 hours?
Senior Programmer: YES! How about 8 story points?
Junior Programmer: 64 hours!
Senior Programmer: The student has become the master!
Junior Programmer: Thank you! Thank you! (Bowing and blowing kisses to an invisible audience)
Scrum Master: Very funny. You've made your point.
And don't forget to extrapolate how much more could be achieved, if you just hired some new programmers or cloned the existing ones. That's the real magic...
well in my org they straight forward made 1 SP = 4 hours (effective hours)