A story was estimated at eight ideal hours. A working day is eight hours. Developers can get about six hours of work done on a daily basis. What is the elapsed time required to complete the story?

Question

Options

• A1.25 days
• B1.33 days
• C2 days
• DThis cannot be determined without knowing the velocity.

• A
  8% (3)
• B
  73% (27)
• C
  5% (2)
• D
  14% (5)

Explanation

Elapsed time = ideal hours ÷ productive hours per day. With 8 ideal hours of work and only 6 productive hours available each day, the calculation is 8 ÷ 6 = 1.33 days, making B correct.

Why the distractors are wrong:

• A (1.25 days) would require 8 ÷ 1.25 = 6.4 productive hours per day - a rate not given in the problem.
• C (2 days) is a common trap; it confuses "8-hour story in an 8-hour day = 1 day" intuition and then doubles it - there's no basis for that math here.
• D is wrong because velocity measures how many story points a team completes per sprint; it doesn't determine elapsed calendar time for a single story with known productivity data. You already have everything you need.

Memory tip: Think of it as a fuel economy problem - ideal hours is the distance, productive hours/day is your speed. Distance ÷ speed = time. Whenever a question gives you both "ideal effort" and "daily capacity," divide them directly; don't let the 8-hour workday distract you from the 6-hour productivity figure.

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