01
Comparative assessment and business case
Options assessed against a consistent safety, environmental,
technical, regulatory, schedule and cost basis.
- Decision criteria and option framing
-
Comparative assessment or BPEO-style support where applicable
- Business-case narrative and recommendation
- Assumptions, exclusions and evidence position
02
Decommissioning plan development
Programmes and close-out pathways structured around the
jurisdiction, decision gate and supporting evidence.
- Scope and boundary definition
- Programme structure and planning basis
- Stakeholder and evidence requirements
- Close-out and relinquishment pathway support
03
ARO basis, cost and schedule support
Engineering support behind the provision basis, with scope logic
and cost-driver limitations stated clearly.
- Basis-of-estimate support
- Quantity and assumption review
- Schedule logic and key dependencies
- Targeted estimate-class language only where supported
04
Method and engineering development
Removal, isolation, demolition, logistics and well P&A
methodology support developed to the required study stage.
- Removal and preparation concepts
- Constructability and temporary-state considerations
- Transport, load-in and disposal interface review
- Execution method development support
05
Contracting and execution strategy
Packaging, interface and commercial strategy that makes
accountabilities visible before tendering.
- Scope packaging
- Contract model considerations
- Interface and demarcation registers
- Tender strategy and technical response support
06
Regulatory and permitting pathway
Pathway mapping and evidence planning aligned to the applicable
jurisdiction and the actual asset scope.
- Regulatory obligation mapping
- Submission support
- Evidence and status tracking
- Close-out and permit-relief planning
07
Owner’s engineer and delivery support
Independent technical oversight where continuity from planning
into delivery adds value.
- Technical assurance and method review
- Interface and scope management
- Client-representative support
- Defined small-scope delivery support where agreed
08
Documentation gap review
A structured view of what the inherited record set supports and
what should be remediated first.
- Source-register review
- Critical gap identification
- Decision-impact framing
- Optional decomm.ai pathway