Questions tagged [supply-chain]

For questions related to Operations Research approaches for modeling, managing, or optimizing supply chains, systems designed to move goods from where they are produced to where they are consumed.

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Supply chain simulation is not working. Any help please?

I am trying to simulate a supply chain scenario. Demand is random (e.g. between 100-400 units) and lead time vary 2 to 4 days for each supply. The holding cost(h), penalty cost (p) for lost_sales, ...
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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: ...
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What is the difference bewteen CP and MILP approaches in Job Shop Scheduling?

My understanding is Constraint programming (CP) is a sub-set of MILP but in MILP we not only try to find a feasible solution (like CP) but also we should optimize an objective function. I do have a ...
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2 votes
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WIP Inventory Level Constraint?

I'm modeling a continuous-time, two-stage manufacturing process with an MIP. There are about 100 finished-goods SKUs, and each of those belongs to about 25 different semi-finished categories in a ...
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1 answer
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Supply Chain shortage drug Public Data Repository [closed]

I don't know if I'm in the right place but I have a relevant problem. I need a dataset on drug supply shortages because I need it in my graduation thesis. PS: I looked everywhere but couldn't find ...
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1 vote
2 answers
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Improving Customer First Fulfillment Rate

Data Available: Historical Weekly Demand Total SKU's = ~ 2500 Historical Lead times (Most Suppliers' Shipping from Asia to the US) Problem to solve: Improve First Fulfillment Rate to the Customer ...
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1 answer
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Where to download SISCO-simulator for integrated supply chain operations

I am trying to find the software called SISCO (Simulator For Integrated Supply Chain Operations). It is developed by Chatfield et al. (2006)1. However, it seemed that the authors did not include the ...
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1 answer
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Advanced Transportation optimization problem

I'm trying to explore OR problems and wanted to know what algorithm fits here. Consider fuel stations with lithium ion battery that service replacing battery at each refuel ( you replace your batters ...
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11 votes
4 answers
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Recommendations for OM blogs

Could someone suggest good blogs to follow for researchers in Operations Management/ Supply Chain Management /Operations Research?
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Procurement and supply management: model-oriented undergradute textbook

I look for an undergraduate-level textbook on procurement and supply management that is largely organized around (reasonably simple) mathematical models. The texts I have reviewed so far are all ...
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4 votes
1 answer
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Is Multidisciplinary Design Optimization / Collaborative Optimization used anywhere outside of the Mechanical Engineering context?

I recently stumbled across the concept of Multidisciplinary Design Optimization (MDO), sometimes referred to as Multi-Disciplinary Optimization or Multidisciplinary Systems Design Optimization (MSDO), ...
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11 votes
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Is a "multistep" or "multiphase" Newsvendor model possible?

I'm trying to address the question of how many times should I order a product from my supplier, assuming highly stochastic demand. In my mind there would be something like the Newsvendor model, but ...
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8 votes
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Buyback policy in a supply chain

Consider a three level supply chain consisting of a manufacturer, a wholesaler and a retailer. Suppose I wish to include a buyback contract to this network. Then am I right when I say that wholesaler ...
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10 votes
3 answers
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Holding cost vs carrying cost vs storage cost

I was reading an article on supply chain management and encountered a number of inventory costs like ordering, carrying, shortage, holding, storage costs. I cannot understand the difference between ...
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10 votes
1 answer
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Approaches for choosing a "risk" factor in an Inventory Optimization problem?

I'm working on an Inventory Optimization (Allocation) problem. The decision variable is the amount of inventory budget to allocate for each product, from a set of products. My objective is to ...
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14 votes
4 answers
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Good distribution assumptions for customer demand in a supply chain

Why do we normally assume normal distribution/Poisson distribution for customer demand in a supply chain? Are there other good distribution assumptions?
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12 votes
2 answers
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Supply Chain Public Data Repository

I was wondering if there is any repository of datasets for supply chain problems. For example, the UC Irvine Machine Learning Repository contains datasets for ML, and MIPLIB is used as a benchmark for ...
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