Cost Report Details -or- "It costs how much for that thing-a-ma-jig?"

[FSAE2003]

Hi everyone, I hope that your vehicle is coming along as well as ours.

Okay here is a question that we have been having trouble figuring out. How does one properly cost out particulars of their car if the price of the materials purchased is much higher than that printed in the minimum cost tables?

For example, if we purchased chromoly tubing and it cost us (as per invoice) $500.00 but the Minimum Cost Table states that alloy steels will be costed at $0.60 a pound, which value should be used. If the minimum cost table is used then the receipts we have for materials would not correspond to what we listed in our cost report. Are the minimum cost tables there only for items you do not have receipts for? http://fsae.com/groupee_common/emoticons/icon_confused.gif That is where the confusion lies.

Your assistance is appreciated.

[FSAE2003]

Hi everyone, I hope that your vehicle is coming along as well as ours.

Okay here is a question that we have been having trouble figuring out. How does one properly cost out particulars of their car if the price of the materials purchased is much higher than that printed in the minimum cost tables?

For example, if we purchased chromoly tubing and it cost us (as per invoice) $500.00 but the Minimum Cost Table states that alloy steels will be costed at $0.60 a pound, which value should be used. If the minimum cost table is used then the receipts we have for materials would not correspond to what we listed in our cost report. Are the minimum cost tables there only for items you do not have receipts for? http://fsae.com/groupee_common/emoticons/icon_confused.gif That is where the confusion lies.

Your assistance is appreciated.

[Frank]

http://www.uq.edu.au/fsae/Final%20Submission/Report%20HTML/Car.htm

we tried to be conservative..

we use SAE (per pound) costs for
plate, sheet, round, square, and flat

we use quotes for hollow sections and extrusions
tube, angle, SHS (as you noticed they are considerably more expensive)

we used SAE (per pound) for composites
(although I think, in most cases, the quotes would have be much cheaper)

Frank

"These cars feel great..SIDEWAYS"

[Scott Wordley]

We used the listed costs for all of the materials and for all of the processes and only used receipts for purchased components.

Regards,

Scott Wordley & Roan Lyddy Meaney
Monash FSAE Wingmen
http://www-personal.monash.edu.au/~fsae

[Michael Jones]

...as bizarre at it sounds, is the right solution for all standard listed materials - it's actually less a minimum than a flat rate. My best guess is that the metals prices are artifically cheap and the composites artificially heavy to level the playing field and structure design around well understood, less exotic materials.

---
Cornell Racing
http://fsae.mae.cornell.edu

[Charlie]

Are people actually getting away with costing tubing per pound? That's ridiculous, as the lighter it gets the more expensive it actually is. My understanding is the weights are for blocks or bars of material, for machined parts. Not for items like tubing.

-Charlie Ping
Auburn University FSAE 1999-present