Condition Estimation using Interpolation

Condition Estimation using Interpolation

The interpolation equation is:

Where:

p.x is property x of the condition/date pair being estimated

l.x is property x of the last observed condition before the condition/date pair being estimated

n.x is property x of the next observed condition after the condition/date pair being estimated

Age properties are always determined based on time elapsed since the last Major M&R construction event.

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		Family		Family
6/1/2003		Family		Family
6/1/2004		Family		Family
9/1/2004		Family		Family
9/1/2004	100	Reconstruction		Family
1/1/2005		Family		Family