Question

1.

The first unit took 10 hours and the fourth unit 8.1 hours. What is the improvement rate?

2.

T1 = 1000, Learning rate = 80%.

It will take _____________ hours to make the first 15 units?

3. The learning curve may not be permanent; it can be disrupted by changes in process, personnel, or product.

TRUE OR FALSE

Answer 1

1)

Time taken by first unit, T1 = 10 hours

Time taken by fourth unit, T4 = 8.1 hours

Using learning curve equation, Tn = T1*r(ln(n)/ln(2)), where r is the improvement or learning rate

T4 = T1*r(ln(4)/ln(2))

T4/T1 = r(ln(4)/ln(2))

T4/T1 = r2

Improvement or learning rate, r = (T4/T1)^(1/2)

= (8.1/10)^(1/2)

= 90 %

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2)

T1 = 1000

Learning rate , r = 80%

Time for each unit is computed by learning curve equation Tn = T1*r(ln(n)/ln(2)),

Calculations are shown in Excel as follows:

EXCEL FORMULA:

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3)

TRUE

The learning or improvement rate may be disrupted by changes in process, personnel, or product. These are subjective factors, which can influence the learning rate.