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Questions tagged [production-planning]

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Theory of Contraints Technical Reference

I have dived into Theory of Constraints by reading The Goal, It's Not Luck, Isn't it Obvious, and Critical Chain. I am currently reading Goldratt's Rules of Flow. While I enjoy these short novels, ...
Galen's user avatar
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1 answer
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Production scheduling

I'm formulating a scheduling problem with the following decision variables: $$X_t \space \text{is power sold to market in time period t} \\ Y_t \space \text{is power used for production in time period ...
fikacoder's user avatar
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2 answers
412 views

Enforce Changeover Constraints in Production Scheduling

I'm building a production scheduling optimization model (but not exactly a jobshop, so I can't just use OR tools). I have decision variables for both the start time of each job, and the duration. ...
Ralph Asher's user avatar
5 votes
2 answers
347 views

Assembly line balancing: What does machine precedence mean?

I am looking at the looking at the following classical integer programming model for assembly line balancing: R.R.Vemuganti's "Applications of Set Covering, Set Packing and Set Partitioning ...
user2153235's user avatar
3 votes
1 answer
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Why are these constraint equations equal?

If we consider the dynamic lot sizing problem with: $d_i$ as the demand per period $i$ and denote $\sum_{i=1}^t d_i$ being the total demand up to period $t$, where $t$ can take values $1, \dots, T$ ...
Steven01123581321's user avatar
5 votes
3 answers
744 views

Minimizing cost of transportation and storage of items

I am looking for an optimization algorithm to minimize the cost of transportation and storage cost in warehouse. Let's assume the following table gives us the weekly forecast of Demand. ...
Lopez's user avatar
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1 vote
1 answer
315 views

Relation between order quantity and average cycle stock

Annual demand: $1000$ units Unit cost: $5$ dollars Company replenishes the inventory two times per year. Average Cycle Stock: $300$ I am asked to compare average cycle stock with number of ...
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1 vote
0 answers
92 views

Production maximization problem

I have the following simplified problem, which I think it is a maximization problem with multiple options, constraints, and a time factor: Factory A, initial number known (e.g. 8), cost 11000, ...
SparklingWater's user avatar