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if you take a panel 48 wide and 50 inches, cut it down to 44 inches long are you not losing 2 feet per panel? at 2 dollars a foot every 100 panels you are throwing away 200 dollars. we do this a lot at work and i caint believe the loss. am i wrong in the way i figure that or is that a normal thing to do in the wood buisness?
Why are you starting from 50" long and not 96"long?
There are computer programs that optimize the pieces of different sizes with the size of a panel. The same for cutting lumber into shorter pieces. But sometimes, there will be yield loss. A 50% yield for lumber (including end trim, knots, etc.) is common.
We also get 50% yield from a log too.
And we get about 50% yield of logs from a tree.
we chop stock sizes and use one length for different sizes. example we may chop a 50 inch piece and use it for a 48 inch, 46 inch, 44 inch and a 42 inch piece. we make up the panel then double end to one of those sizes. they do that because it is easier on the chopsaws to chop for the orders. im from a company that chopped 1 inch over per size to get maxium yield.
While your calculation is correct, it does not go far enough.
What is the extra cost involved with buying, shipping, stocking etc. material that would yield better?
What changes to your labor efficiency would there be? Labor is typically by far the biggest expense in a cabinet shop. Material waste has to be pretty large, or a very expensive material, to justify spending labor time to avoid it.
Think of a new shop owner who builds storage racks for all the "shorts" he wants to reuse later. Over a few months of busy shop work, the racks fill and stock begins overflowing around the shop. He wants to reuse them, but it is simply faster and easier to grab a new sheet and get the job done.
Hope this helps,