Page 45 - 6634

* Basic design results enable a reliable cost-and-schedule estimate and

ordering long lead major equipment and structural components (which

enables a contractor to provide a reliable bid for detailed engineering,

procurement and construction - EPC - contract for the platform). The basic

design phase comprises the following tasks:

1. Prepare detailed and final process flow diagrams. If detailed design is

attempted without final PFDs, process changes during the final design phase

may cause significant rework and schedule and cost overruns.

2. Prepare piping and instrumentation drawings (P&IDs),

3. Prepare final deck and facilities layouts, providing adequate space and

clearance for all equipment and operations,

4. Prepare equipment and material lists, data sheets and specifications,

5. Prepare detailed engineering, transportation. pre-commissioning, Hookup
and Commissioning - HUC - scopes of work,

6. Prepare detailed design schedules and cost estimates,
7. Perform global in-place analyses to confirm that major member and

equipment sizes are adequate,
8. Prepare basic design drawings for all major platform and deck structures and

components (jacket, deck, piles and conductors). These should contain

enough detail to enable a reliable - ± 20% - field development cost and

schedule estimate. Thus information is particularly important if owners wish

to go out for bids and enter a lump sum EPC agreement with a contractor.

9. Prepare basis of detailed design - BOD - document for the detailed design

phase. BOD defines the detailed design requirements including the:

 Platform configuration,

 Environmental parameters (metocean, seismic, ice, etc.),

 Site-specific information (water depth, temperature, soil characteristics,

mud slides, shallow gas pockets, etc.),

45