# Tag Info

### What is the difference bewteen CP and MILP approaches in Job Shop Scheduling?

CP is not a subset of MILP. They are separate modeling/solving paradigms whose domains of application overlap. Both can solve for optimal solutions (in CP's case, by incorporating a constraint that ...
• 33.8k

### Transportation problem with consolidation within path

If your demands are per source-destination pairs, then you are very likely dealing with a variation of the multi-commodity flow problem, where each source-destination pair is a commodity. The ...
• 11.2k

### What is a transport order in supply chain management?

According to a colleague in supply chain management (who is not 100% confident in his answer), the phrase "transport order" frequently (usually?) means an order to move stock from one ...
• 33.8k

### Improving Customer First Fulfillment Rate

Before asking if demand and lead time have a specific distribution (normal or other), you might want to ask whether they have stationary distributions or exhibit trend and/or seasonality. If the ...
• 33.8k

### What is the difference bewteen CP and MILP approaches in Job Shop Scheduling?

Google has a very nice library called OR Tools. One of those tools is a CP-SAT solver. Even though their solver works only on integer valued variables it is not that hard to convert MILP models to ...
• 331

### WIP Inventory Level Constraint?

What you are trying to do sounds like an MRP (material requirement planning) system. For this, you already need to define the component's precedence relations as a directed graph and apply the stages ...
• 6,500

### WIP Inventory Level Constraint?

I assume this is a multiperiod problem. Create a variable $I_{k,t}$ for the inventory of category of category $k$ material available to the second stage at the end of time period $t$. Production ...
• 33.8k
1 vote

### Transportation problem with consolidation within path

I see it more like a variation of Travelling salesman Problem (TSP) with a limit to intervening/transhipment nodes. Gurobi has a solution to that here The formulation goes like this: A,B are src-dest ...
• 632
1 vote
Accepted

The author of this software replied to my inquiry, but unfortunately, the author said he didn't make it freely available. It is a bit old and was developed on Windows XP. It is likely not going to run ...
• 173
1 vote

### Supply Chain shortage drug Public Data Repository

Try plugging "drug shortage" and similar phrases into Google's dataset search engine.
• 33.8k
1 vote

### Improving Customer First Fulfillment Rate

Be careful about using the Normal distribution. It allows for negative values. Lead times are never < 0. Demand is almost never < 0 ( only if product returns > product sales). An obvious ...

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