Condition Estimation using the Family Curve

Family curves are stored as a series of points in CurveX and R0. You feed them and an age into the spline() function to get the family curve value for any given age. The equation for determining condition using a family curve is:

Date

Section 1 PCI

Section 1 PCI Type

Section 2 PCI

 

Section 2 PCI Type

Average

1/1/1995

100

Initial Construction

NULL

NULL

 

1/1/1996

97.4

Interpolation

NULL

NULL

 

1/1/1997

94.9

Interpolation

NULL

NULL

 

1/1/1998

92.3

Interpolation

NULL

NULL

 

6/1/1998

91

Inspection

NULL

NULL

 

6/1/1999

88.4

Interpolation

NULL

NULL

 

6/1/2000

85.9

Interpolation

NULL

NULL

 

9/1/2000

83.3

Interpolation

100

Initial Construction

 

6/1/2001

82

Inspection

97

Inspection

 

6/1/2002

81

Family

96.8

Family

 

6/1/2003

79

Family

96.6

Family

 

6/1/2004

76

Family

96.4

Family

 

9/1/2004

71

Family

96.1

Family

 

9/1/2004

100

Reconstruction

95.7

Family

 

1/1/2005

99

Family

95.3

Family