Concept Definition and Pre-FEED
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Concept Definition, or pre-FEED, adds a further level of detail to the option selected at the conclusion of Concept Select to achieve more precise definition, a better cost estimate and, ultimately, a scope of work for FEED.
The scale of a Concept Definition or pre-FEED phase can vary dramatically depending on the nature of the project. Regardless of scale, the activities in Concept Definition are chosen to address the development's circumstances and can include:
Process scheme optimisation
Reduction in optionality using targeted studies of particular aspects of design e.g. technology selection
Finalisation of field architecture
Preliminary P&ID development
Issue of enquiries for long lead or high cost items
Cost estimating and economic assessment
Project schedule enhancement
Preparation of survey scopes of work, tendering and management of the work
Engagement with other work groups and third parties to reduce uncertainties e.g. drilling, reservoir engineering, tie-ins to other facilities, regulatory authorities, buyers of products.
Development of risk mitigation plans
Project execution plan and contracting strategy finalisation
Basis of design update
Commencement of the ESIA process
FEED Scope of Work
As a result, the development enters FEED with a well-defined option in which:
Major design decisions have been made;
Risks and uncertainties are understood and mitigated where appropriate;
The execution approach, cost estimate, budgets and schedules are clear and complete.