Total Distribution Cost TDC= (cargo rate*tons *nautical miles)+(time*cargo value*ICC) SO TDC/ton-nm cargo rate +(1/speed cargo value/pound * ICC *0. 2283 Where units are s, tons nautical miles knots
Total Distribution Cost TDC = (cargo rate * tons * nautical miles) + (time * cargo value * ICC) so TDC/ton-nm = cargo rate + (1/speed * cargo value/pound * ICC * 0.2283) Where units are $, tons, nautical miles, knots
Total Distribution Cost Plot shows relationship between 0.80 value, ICC, TDC and speed Ship For three vehicle systems b0.60 Y-intercept is cargo rate, slope is s ?q Standard Air proportional to 1/speed Note that speed is not vehicle 0.30 land-based speed alone, but entire supply chain speed. Very important Line for WIG is speculative Fast. intermediate-cost vehicles Value per Pound x Inventory Carrying Cost can provide lower tdc for some (S/b) types of goods Check out this reference: B K. Rawdon, Z.C. Hoisington, Air Vehicle Design for Mass-Market Cargo Transport, AIAA 2003-0555, 2003
Total Distribution Cost • Plot shows relationship between value, ICC, TDC and speed – For three vehicle systems • Y-intercept is cargo rate, slope is proportional to 1/speed – Note that speed is not vehicle speed alone, but entire supply chain speed. Very important! • Line for WIG is speculative • Fast, intermediate-cost vehicles can provide lower TDC for some types of goods 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0 5 10 15 Value per Pound x Inventory Carrying C ost ($/lb) Total Distribution Cost ($/ton-nm) Standard Air Carg o Ultra-large, land-based WI G Shi p Check out this reference: B. K. Ra wdon, Z. C. Hoisington, Air Vehicle Design for Mass-Market Cargo Transport, AIAA 2003-0555, 2003