The first unit required 6 hours. If the industry uses a 90 percent learning rate, how long should the fourth unit take?
A) 6 hours
B) 4.86 hours
C) 3.75 hours
D) 3.34 hours
E) 2.67 hours

Question

Quizplus · Accepted Answer

The learning rate formula is Tn = T1 * n^(log b / log 2), where Tn is the time it takes to produce the nth unit, T1 is the time it takes to produce the first unit, n is the unit number, and b is the learning rate. For the fourth unit (n=4) with a 90% learning rate (b=0.9), the calculation is 6 * 4^(log 0.9 / log 2) ≈ 4.86 hours.

The First Unit Required 6 Hours