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#1
10-03-2008, 02:16 AM
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| Cost Estimate - Watson Hi, I have a spread sheet with Watson's method of cost prediction (from "Practical Ship Design" book) and I wanted to use it, but I was analysing it and the first formula I have (probably taken from a graph in the book) doesn't make any sense: Structure Cost = -590*58*log(Steel Weight)+7648.2 This negative sign gives me a negative Structure Cost! Since the spreadsheet was made a long time ago and I don't have access to that book anymore, I don't remember how that formula is even possible! Is anyone familiar with Watson's theory or could anyone suggest me another good cost estimate method? Thank you!  |
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