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# Questions tagged [logistics]

Logistics refers to the overall process of managing how resources are acquired, stored, and transported to their final destination.

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### Determine (in 2 iterations)

A company following the reorder level policy has the following costs associated with a given product: ordering cost of 100 monetary units (u.m.) per order; stock holding cost of 12 u.m. per unit per ...
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2 votes
0 answers
68 views

### Multi Commodity VRP Time Windows Paper

I have been wondering is there any paper that who discuss multi commodity with four index/indices like this formulation below:  \begin{gathered} \sum_{k} \sum_{c} F_{j, j, c, k}=1 \quad \forall j \\ ...
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2 votes
0 answers
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### Preprocessing Time Windows Width in Vehicle Routing Problem (VRP)

I think my model takes much time because the time windows width given the problem i want to solve. Here is the time matrix: ...
• 593
3 votes
0 answers
91 views

### How to compute the time required to transport one unit of flow on a given path?

My question is related to freight transportation, but I am stuck on the logic. So, I am considering a path between two points $(a, b)$ where I am sending $n$ trucks where the capacity/truck is $k$. ...
• 115
-3 votes
1 answer
57 views

### What is dynamic facility location problem ans how to formulate the same? Please help [closed]

Please explain how the problem solution looks like. basically I want model to dynamically give me multiple facility locations for a given demand.
4 votes
1 answer
369 views

### VRP book recommendations

I am looking for a book recommendation on the VRP and variants. I am encountering VRP-like problems more and more in my work and would appreciate a reference.
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26 votes
5 answers
2k views

### What's the current status of the Vehicle Routing Problem in the logistics industry?

After a bit of reading I think I've been able to conclude that state-of-the-art VRP can get solutions for 100~500 stops. My question is around how this actually affects logistics (like Amazon for ...
13 votes
2 answers
126 views

### Sensible and realistic way to model truck based transport costs depending on amount

Different kinds of problems involve transporting an amount $x$ from A to B which results in a cost $c(x)$ in the objective function. Traditionally, often linearized costs are used to get an easy, ...
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