Logistics refers to the overall process of managing how resources are acquired, stored, and transported to their final destination. The "how" often includes an optimization aspect: many "ways" are possible, and we must choose one that is "best" (or, due to limitations, at least "good enough") in some sense.
Questions tagged [logistics]
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Logistic equation with or without brackets is correct?
I am coding a logistic function where the function reads:
Now to calculate the % chance of an event happening I have been using:
e^x/1+e^x
now my answer changes significantly depending on if I use:
e^x/1+e^x or e^x/(1+(e^x))
which of these two is…
Ryflex
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Conditional logistic regression in SPSS (using multinomial logistic regression)
I want to use NOMREG of SPSS (by GUI from "Regression --> Multinomial Logistic Regression") for my matched data. However, I don't know where to insert the strata variable (the matching variable) into the GUI or syntax.
On a side note, I have a…
Vic
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Excel 2007 VBA If-THEN-ELSE Shipping Logistics
I have a spreadsheet with 3 columns: order type, order date, and target ship date. There are 4 order types: USA, USAPriority, Canada, and Med.
Each order type only ships out on a certain date.
USA order types can ship out 2 days after the order…
Newbie1331
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R Plot empirical probability of Logistic Regression
I'm trying to plot empirical probability of a logistic regression. My data is students' homework score range from 0 to 20. The response is if they passed the final exam, 1 for pass and 0 for fail.
I want to know from my data, what is the rate of…
NewbieDave
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Weka - Logistic regression - Interpreting results
I am using Weka to perform a logistic regression using training data where a binary outcome is known. It performs reasonably well, categorizing approximately 80% of instances correctly. I also have a data set using current data where the outcome is…
zgall1
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Python | Calculate Volume with Objects of Set Size Internally
I'm trying to figure out how to calculate how many boxes can fit into a shipping container for my work. Does anyone know how I can do this in with Python? There's an example here:
http://www.searates.com/reference/stuffing/
Basically, user enters…
jmitchel3
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Scalable reservation system architecture - serious flaw
do you have guys any experience with way how modern scalable reservation systems works ? e.g. airports or transport agencies ?
We just found serious flaw in reservation system of our customer. They reserve seat for each user which search for travel…
Martin V.
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Logistics and transportation planning techniques
I'm actually developping a system for bus ticket reservation. The provider has many routes and different trips. I've setup a rather comprehensive database that maps all this together, but i'm having trouble getting the pathing algorithm working when…
Mathieu Dumoulin
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Predict the ID for similar records for unseen data
I have a labelled dataset, I want to find the similar entity. All the similar entities are assigned an entity_id. Meaning that if two records are similar they will have the same entity I'd.
Now if the new entity is not similar to any of the existing…
Sonakshi
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How can I create an initial utilization state for storage in anylogic?
I need my logistic platform / storage to have an initial state when the simulation first runs. This state is when some percentage (%) of the platforms is already full of pallets, which would be our normal situation during production. When the models…
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How can I implement these 2 additional constraint in this AMPL shortest path problem?
This is the problem
So given this, If I want to Formulate an ILP model to determine the least costly route in case there are the following additional constraints:
-if arc (1,4) is used, then also arc (4,6) must be used;
-on the other hand, if arc…
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Building Information logistic application
want to build an ILOG application, yielding to a demand driven information
supply of patients before, during and after a medical treatment. The application should
know certain content sources (e.g. health databases), know a user’s information…
Sudan Vkv
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Best possible metric vs imperial conversion table?
Is there a better, smarter way of structuring a metric vs imperial conversion table than the one below?
I.e. for a spreadsheet for calculating storage / shipping costs for products whose suppliers use different unit systems.
Thanks in…
Mark Boulder
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Make Calculated Table of Stops that looks at both Pickup and Delivery Stop on an Order
I do Power BI for a logistics company. We want to show performance by stop location. The data is currently a table of all orders by Order ID, so -- ID, Rev $, Pickup Stop, Delivery Stop. Everything is a 2-stop load, fortunately.
What I am struggling…
Evan Swanzy
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