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Enabling Earlier Outfitting Expected to Save Future Aircraft Carrier Construction Costs

05/19/2017

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Efficiencies can be realized by increasing the amount of construction work done prior to erection. (NNS photo)



S2561 CVN Vertical Build

Problem/Objective:

The build strategy for CVN 78 required much of the ship outfitting activities to be completed in the dry dock, in areas that were difficult to access. Identifying outfitting activities that can be done earlier in the shipbuilding process can save construction costs. A Navy Metalworking Center (NMC) project team identified systems and specific construction areas of future aircraft carriers that could benefit from pre-outfitting concepts, which improve construction efficiencies. The team also identified systems and subsystems for rafting and developed structural concepts for construction in shops, rather than concurrent with the structural assembly.

Accomplishment/Payoff

Process Improvement:

This project identified areas of the ship that would benefit from pre-erection outfitting and benchmarked the best practices of other shipbuilding programs and commercial industry to determine concepts that could be applicable to shipbuilding. Accomplishments include addressing issues that were encountered completing CVN 78 and the development of a sequence for complete outfitting of multiple berthing spaces on the Final Assembly Platen (FAP), a first for CVN construction.

Implementation and Technology Transfer:

Pre-outfitting of targeted areas was implemented in the planning of future aircraft carriers. Work packages that reflect the new strategy are currently being completed at Newport News Shipbuilding (NNS). One space has already been completed and inpected by NNS on the platen, prior to erection.

Expected Benefits:

• Pre-outfitting will allow greater access for equipment and workers, and will reduce congestion and conflicting work and testing on hull after erection. • Cost reductions are based on the 1-3-8 rule (shop/platen/post-erection construction costs) and possible reduction in build duration. • Two benefits analyses, using different methodologies, were utilized to project the benefits: o NNS analysis indicates a nearly $4M benefit. o The NMC/Hepinstall analysis indicates a nearly $7M benefit.

Participants:

PMS 379 Supervisor of Shipbuilding-Newport News NNS Hepinstall Consulting Group, Inc. NMC ONR Navy ManTech

For more information, contact:
Mr. Robert E. Akans
Senior Technical Director
akansr@ctc.com
703-310-5634