Dataset: c141_prodhour.csv

Source: J.D. Camm, J.R. Evans, N.K. Womer (1987). "The Unit Learning Curve
Approximation of Total Cost," Computers in Industrial Engineering,
Vol. 12, #3, pp. 205-213.

Description: Costs of Production Lots of US Air Force C-141 planes.
Learning Model: Y = A*X^-b   where Y = cost of Xth plane,
A=cost of first plane and  b=learning parameter
Cumulative cost of first K planes: A * sum_{i=1}^K X^-b

Integral approximation when cost of lots of K_i planes are observed:
Model A1: Y_i = (A/(1-b))[(N_i+K_i)^(1-b) - (N_i)^(1-b)]
Model A2: Y_i = (A/(1-b))[(N_i+K_i+0.5)^(1-b) - (N_i+0.5)^(1-b)]

where: N_i = # planes built prior to lot i (N_1=0)
       K_i = # planes built in lot i
       Y_i = # of on-site direct man-hours per lot

Variable Names:
Lot
K
N
X_LO    (N+1)
X_HI    (N+K)
X_Sum   sum(N+1:N+K)   - not useful in program
X_A2_1  (N+K+0.5)
X_A2_2  (N+0.5)
Y