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Much of the design effort for naval ships is devoted to development of repeat ship designs. The decision to repeat a design rather than develop a new one is often based on perceptions of what the repeat ship will be; that it will be less expensive or that it will be available sooner. This paper addresses these factors in depth. Repeat designs prepared in the last decade by NAVSEA (Naval Sea Systems Command) are described. The similarity and differences between the earlier design and the repeat design are noted. Examples are discussed of repeats that are exact copies to those that are significantly different. Reasons for changes between the designs are identified. The significant requirements changes that occurred over the years and forced changes to the earlier designs are presented. Costs for the various phases of ship development are provided for the original and the repeat designs. Separate costs are shown for early stage and detail design and production. Costs have all been adjusted to a common base for easy comparison. The times for design and construction and delivery of the ship are presented. The findings in regard to both costs and times are highlighted and discussed. The paper concludes with guidelines that should be used in determining whether a repeat or new design should be undertaken.

Document Type: Original Article

Publication date: May 1, 1983

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  • The Naval Engineers Journal is the peer-reviewed journal of the American Society of Naval Engineers (ASNE). ASNE is the leading professional engineering society for engineers, scientists and allied professionals who conceive, design, develop, test, construct, outfit, operate and maintain complex naval and maritime ships, submarines and aircraft and their associated systems and subsystems.
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