Marine Link
Friday, September 30, 2016

SPAR Upgrades Cost Estimating Models

July 15, 2009

SPAR’s cost estimating models have recently been upgraded in an effort to provide complete life cycle cost estimates. Mono-hull, trimaran and catamaran hull forms all have separate cost models. Other models focus on specific ship types, including tankers and product carriers, Ro-Con-PAX ships, research vessels and barges. Military ship cost models include patrol boats, cutters, frigates, and amphibious ships.

The cost models are parametric and offer a wide range of options: dimensional; cargo carrying capacity; propulsion systems; crew and passenger size; structural materials, systems and equipment.  Details of the estimate are generated at approximately the 3-digit SWBS level.  The cost models also produce cost risk based upon estimates of expected engineering and shipbuilder’s capabilities and expertise as well as estimates of relative design complexities and expected build strategies. 

For life cycle costs, annual estimates are generated for capital financing and return on equity; maintenance; salvage/resale; insurance; administration; supplies and crew. Fuel, port and drayage costs complete the operational cost estimates where average voyage scenarios (speeds and distances) are defined by the estimator.  The cost models develop Required Freight Rates (“RFR”) on the basis of unit (trailer, TEU, barrels, etc.) voyage cost, tonnage, and/or equivalent statute land miles.  The models allow sensitivity cost studies such as tracking RFR versus fuel costs and many other design, construction and operational parameters. 



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