Page 228 - Sustainable Cities and Communities Design Handbook

202 Sustainable Cities and Communities Design Handbook

Appendix B
Summary of equations and glossary of symbols.

Basic Equations
Participant Test

NPV P ¼ B P C P
NPV avp ¼ðB P C P Þ=P

BCR avp ¼ B P =C P
DP P ¼ min j such that B j > C j

Ratepayer Impact Measure Test

LRI RIM ¼ðC RIM B RIM Þ=E

FRI RIM ¼ðC RIM B RIM Þ=E for t ¼ 1
for t ¼ 1
ARI RIMt ¼ F RIM
for t ¼ 2; .N
¼ðC RIMt B RIMt Þ=E t
NPV RIM ¼ B RIM C RIM
BCR RIM ¼ B RIM =C RIM

Total Resource Cost Test

NPV TRC ¼ B TRC C TRC

BCR TRC ¼ B TRC =C TRC
LC TRC ¼ LCRC=IMP