target.arrival.sf: Arrival target setting using SF

In DJL: Distance Measure Based Judgment and Learning

Arrival target setting using SF

Description

Employs dm.sf over time to estimate the arrival of known specifications. This function is valid only when multiplicative form of directional vector is used.

Usage

target.arrival.sf(xdata, ydata, date, t, rts="crs", g=NULL, 
                  wd=NULL, sg="ssm", ftype="d", cv="convex", anc=FALSE)

Arguments

xdata	Input(s) vector (n by m)
ydata	Output(s) vector (n by s)
date	Production date (n by 1)
t	A vantage point from which the RoC is captured
rts	Returns to scale assumption "crs" Constant RTS (default) "vrs" Variable RTS "irs" Increasing RTS "drs" Decreasing RTS
g	Directional vector indicating a measurement direction (n by (m+s)) By default (NULL), xdata & ydata will be used
wd	Weak disposability vector indicating (an) undesirable output(s) (1 by s)
sg	Employs second-stage optimization "ssm" Slack-sum maximization (default) "max" Date-sum maximization "min" Date-sum minimization
ftype	Frontier type "d" Dynamic frontier (default) "s" Static frontier
cv	Convexity assumption "convex" Convexity holds (default) "fdh" Free disposal hull (this will override rts)
anc	Implements a stepwise RoC computation if TRUE

Value

$eff_t	Efficiency at t
$lambda_t	Intensity vector at t
$eft_date	Effective date
$roc_avg	Average RoC
$roc_anc	Local RoCs across the periods
$roc_local	Local RoC
$roc_ind	Individualized RoC
$arrival_avg	Estimated arrival using roc_avg
$arrival_seg	Estimated arrival using roc_ind

Author(s)

Dong-Joon Lim, PhD

References

Lim, Dong-Joon, et al. "Comparing technological advancement of hybrid electric vehicles (HEV) in different market segments." Technological Forecasting and Social Change 97 (2015): 140~153.

Lim, Dong-Joon, and Timothy R. Anderson. Time series benchmarking analysis for new product scheduling: who are the competitors and how fast are they moving forward?. Advances in DEA Theory and Applications: with Examples in Forecasting Models. (2017): 443-458.

See Also

dm.sf Distance measure using SF
roc.sf RoC calculation using SF
map.soa.sf SOA mapping using SF
target.arrival.sf Arrival target setting using SF

Examples

# Estimate arrivals of MY2013 hev models
  # Load hev dataset
  df <- dataset.hev.2013
  
  # ready
  x <- subset(df, select = 3)
  y <- subset(df, select = 4 : 6)
  d <- subset(df, select = 2)
  g <- data.frame(x, y)
  
  # go
  target.arrival.sf(x, y, d, 2012, "vrs", g)$arrival_seg

DJL documentation built on March 31, 2023, 9:05 p.m.