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A comment on Solar-Powered Trash Cans Saved Philadelphia Almost a Million Bucks Last Year. Parent comment

Re:Solar-Powered Trash Cans Saved Philadelphia Almost a Mill... by VLM on Monday March 25, 2013 @04:07PM (#5439391)
See that's the part I don't understand. I did a separate numerical analysis that the largest cost of garbage pickup is paying people for windshield time not fuel cost. If you skip stopping at every can along the way, you cover the same distance slightly cheaper, but $900K implies an absolutely huge savings which doesn't add up because its nearly their entire departmental labor budget, not, I can drive from the dump to 3rd street in only 7 minutes now instead of 10 minutes because I'm not stopping at every can.

I would have to check my numbers. It might be that garbage men total cost of salary and benefits is a (large) multiple of $30K/yr (getting into software engineer pay territory) in which case windshield time is even more incredibly expensive. Then it might work out that reducing labor cost by 10% or so would actually work out to 900K/yr.

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Re:Solar-Powered Trash Cans Saved Philadelphia Almost a Mill... by tsotha on Monday March 25, 2013 @06:48PM (#5440225)
Presumably since the cans get emptied so much less often they can get big savings by skipping 3rd street entirely because none of the cans is reporting full.
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Re:Solar-Powered Trash Cans Saved Philadelphia Almost a Mill... by VLM on Tuesday March 26, 2013 @08:26AM (#5442726)
Maybe, but they still have to drive past the 3rd street cans on the way from the full cans on 2nd street to the full cans on 4th street. I'm thinking windshield time is much larger than emptying time. Basically garbage truck drivers probably spend a lot more time driving than hoisting trash cans.

Its like the mailman argument. If I don't get any mail today, my mailman can't magically teleport past my house. True he does save the time of opening a box and tossing some sorted mail in, but that action only takes a tiny fraction of the time of walking 100 feet past my property. A registered mail transaction takes a LONG time like 5 minutes and if more people got registered mail (or fewer got junk mail) then the ratio would flip and he'd save huge time.

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Re:Solar-Powered Trash Cans Saved Philadelphia Almost a Mill... by tsotha on Tuesday March 26, 2013 @09:49PM (#5447278)
>Its like the mailman argument. If I don't get any mail today, my mailman can't magically teleport past my house.

No, but he can save a lot of time by not turning down your street at all.

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