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 Message 21894 of 22774 in Behind the Bar
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Subject: Re: How To Measure Partial Liquor Bottles?
From: Dan the Melon Man
Posted: Thu Jul 2. 2009, 11:55 UTC
Followup to: "How To Measure Partial Liquor Bottles?"  by yukina2x  (Thu Jul 2. 2009, 04:16 UTC)
> But I still don't think that's accurate enough by just eyeballing the 
> liquid level in the bottle. Is there a more efficient way of doing 
> so? I would really appreciate any help. Thank you!

In the real world, eyeballing is fine. With a little practice (learning a few 
of the stranger bottles) you'll be accurate +/- 5% . That is entirely good 
enough. Hey, +/- 10% is OK too,
- because it evens out just fine.
- because you are re-calibrated every time a bottle changes, so you can never 
be too far out!
- because it's not worth the extra time and hassle to be more precise.

In practice, we just stocktake to 1/10 of a bottle.

so you've got 20 bottles of vodka at the start of the night, and at the end 
you've got 7 and (about) 6/10

Assuming your eyeballing is only accurate to tenths of a bottle ...
that's  7.6/20.0 +/- 0.1
= possibly inaccurate by up to 1% !
AKA 99% accurate.

NOT WORTH WORRYING ABOUT

If you still care (or have a bean-counting idiot for a manager) you can learn 
how to weigh them. Keyword: "tare weight"

(I'm a bean-counter sometimes. That's why I did the maths long ago and figured 
out which parts of my stock control were not a real problem)
[Dan the Melon Man] Re: drink prices and cost/profit ratios


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