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henrikatworkFlag for Sweden

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Logistics terms definitions, min. 100pts each

Google isn't making me any smarter on the following words. I have a clue what they mean, but I need good explanation:

*Echelon (in the context of one or two echelon networks)

*Company Roll-up (it's part of a header for a diagram, full header: "Network Line Productivity, Whs. Worksers, Company Rollup")

*PDC: In the context of inventory (slide header says: "Not Surprisingly, Non-PDCs Have Higher Storage Densities For All Companies")

best regards,

henrik
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craziest

Here is a hint on how to use google to search for such terms
type in google  Define:"the word" e.g define:Echelon
here are the results
http://www.google.com/search?hl=en&q=define%3AEchelon&btnG=Google+Search
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@Craziest: I already tried "define:". Those 1000 explanations for the word echelon didn't explain echelon from the context I've explained in my question.
The context sounds like this may be from 'marketing-speak.' In such language, misinformation and technical sounding phrases are usually incorporated to provide the perception of superiority.

For "echelon," the standard dictionary definition would seem to apply. However it is not a particularly useful adjective in this situation.  
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bmedward

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Grasping at straws but...  Echelon is the name of company that created an industrial automation network called Lonworks.  A Lonworks network is sometimes (incorrectly) referred to as an "echelon network"
Can you share any more of the context for "company rollup?" Rollup would seem to imply a consolidation of 2 or more statistics, or perhaps the closing of some event. This could apply to some financial, risk, or production calculated number, or something entirely different.  
The context is a benchmarking between differerent manufacturers and their supply-chain effectivity.

@bmmedward: Primary distribution center makes sense, thanks, those 100 pts to you

@bmmedward:company rollup - the slide header has the name: "Network (Outbound) Line Productivity Trend". Third line says "Smaller lines do not appear correlated with line productivity." Fourth line says: "Man1 and Man2 do well, considering they have large lines to distributors."
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from another googlecache link:

http://64.233.161.104/search?q=cache:dzBuLkrqisYJ:web.sma.nus.edu.sg/smaconnect/research.html+%22two+echelon+network%22&hl=en

"We consider a two-echelon network that consists of a hub and multiple warehouses. We assume the demand at each customer location is known. We can segment the customers into two demand classes, based on their delivery lead time (LT) requirements. Customers requiring a short delivery LT must be served from the local warehouse; customers with a long delivery LT can be served from the hub or a local warehouse."

To me that implied a "short deliver lead time echelon" and a "long delivery lead time echelon"

I guess it's more like a generic adjective than a distribution network specific term.
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