• Review of cast iron fitness for purpose (FFP) assessment methods

• Review MRPS risk screening inputs

• Assess historical cast iron pipe failure data

• Review the remediation techniques under consideration by the participants

• Review of cast iron inspection techniques

• Statistical reliability of local inspection data

• Source data on typical pipe loading conditions

• Consideration regarding potential algorithms to be used in the FFP assessment

• Consideration regarding the balance of weighting that should be given to the FFP calculations versus the historical performance data for the asset

• Outline decision support methodology

To develop a methodology that satisfies obligations under the Pipeline Safety Regulations to enable Tier 2/3 pipes to be safely maintained for continued use, or be categorised in such a way to prioritise for remediation or decommissioning. In this context remediation could involve internal repair of pipe and/or joints, or semi structural linings, or fully structural linings if the pipe required decommissioning.

• Evidence of national and global work on CI test assessments. Contact with suitable broad range of stakeholders and review of scientific papers

• Substantive and reliable data has been sourced on CI failure data. Learning adds value in addition to pipe risk score and that the output feeds into the pass/fail criteria methodology

• Commercially available and cost effective CI inspection techniques have been identified. A suitable range of techniques that enables pipes of greater or lesser risk score or other risk factors can be assessed. Ideally 3 or 4 techniques are or could be developed to be applied to pipes of differing initial levels of risk score

• Technically acceptable, cost effective and practical decision support methodologies have been identified. That GDNs reach consensus on approach and external stakeholders sign on (HSE).