volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
Appendices
4.1.8 Sensitivity Analysis
TOR Requirement
1. IRP process will make a variety of assumptions,
some of which may have significant uncertainty.
IRP Reference
Sections
4.5.1, 4.5.2, and
4.5.3
Sections 4.5.1, 4.5.2, and 4.5.3 address the uncertainty for challenges, opportunities, and risk of
the three IRP drivers (Compliance, Asset Renewal and Growth).
2. IRP process will include a sensitivity analysis. Section
3. IRP process will evaluate least cost resource plans
for robustness by varying key assumptions across a
reasonable range.
6.3
Sections
4 and 5.6
Volume 1
Appendix F Volume
3 Appendices C
and D
The Recommended Plan was analysed to assess the impact of three factors:
• The potential benefits of water demand reduction and I/I reduction on the Recommended
Plan.
• The level of asset renewal (A, B, C and composite) on end-of-period asset value.
• The population growth rate (high, baseline and low) on plan requirements.
Basic assumptions regarding future requirements are presented in Section 4 for all three
drivers. The assumptions surrounding asset renewal are provided in Volume 1 Appendix F and
Volume 3 Appendix E.
Costing assumptions are presented in Volume 3 Appendix C.
Financial modelling assumptions are provided in Section 5.6.
Revision: 2012-10-29 Integrated Resource Plan –Appendices G-21
October 31 2012 Page 233 of 272