APPRAISE PHASE, ASSESS PHASE - >6 yrs to 3 yrs before CoP
DEFINE PHASE - >3 yrs before CoP
EXECUTE PHASE - Post-CoP

26 yrs to 3 yrs before CoP - Post-CoP
Strategy alignment (corporate and NSTA) 
Cost forecasting & performance benchmarking

>6 yrs to 3 yrs before CoP - >3 yrs before CoP
Learning and knowledge review (inc. technology assessment)

>6 yrs to 3 yrs before CoP
Evaluate asset condition
Infrastructure reuse/repurposing assessment

>3 yrs to 3 yrs before CoP
Contracting/execution strategies
Tendering
Concept development
Develop decom plans
Detailed engineering
Scope aggregation opportunities

3 yrs before CoP - Post-CoP
Implement repurposing/decom prep
Execute repurposing/decom plans
Cost/schedule monitoring

Key activities/milestones:

  • Late life operating and decommissioning strategies
  • Preliminary cost estimates
  • Stakeholder Engagement Plan
  • Subsurface basis of design


Key activities/milestones:

  • Reuse/repurposing/decom decision
  • Refined cost estimate (Class 3)
  • Contracting strategy
  • Decommissioning Programme (DP) approved by OPRED


Key activities/milestones:

  • Execution contracts awarded Further refined cost estimate (Class 2) and schedule
  • Permits and consent applications
  • Opportunities for execution
    ahead of CoP actioned

Key activities/milestones:

  • Execution cost and schedule monitoring and risk
  • managementProgress reporting (corporate, JV and regulatory)
  • Lessons learneddocumenting