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CHAPTER 18
18–1 On log-log paper, the rate of change is constant. On regular graph paper, the
rate of change looks like it is tapering off when, in fact, it simply means that the
18–4 Using the computer program, for a 75% learning curve the total hours are
175,370. For a 77% learning curve, the total hours are 211,889.
18–5 315 =
1200(150)x
log(315) =
log(1200) +
xlog(150)
18–6 The next 500 units will require 5376 hours.
18–7 From the computer program the 150th unit of the follow-on pro- gram will be
required to reach breakeven.
18–8 On a 75% learning curve, 700 units will be required to reach $475/unit. This
answer may be unrealistic. The market leader required $10,719 for the first unit,
whereas you require only $7150, which is 33% less cost. The question here is
what are the reasons for the lower cost and the better learning curve?
18–9 First of all, 800 units on an 80% learning curve requires 465,579 hours, with the
first 200 units requiring 180,069 hours. Therefore, units 201-800 require
285,510 hours.
