The seventh unit of production took 63.423 minutes while the ninth unit of production took 59.8 minutes. What is the improvement rate?
What will be an ideal response?
T1. = 63.423/(7^b) = 59.8/(9^b)
b = -.234
-.234 = log (1-IR)/log 2.
Log (1-IR) = -.070441
IR = 15%
Note: Students may also recognize this b value from Table E.2 as an 85% learning curve and then convert that into an improvement rate.
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