New answers tagged scheduling
2
votes
Is this classed as a version of jobshop? How should it be approached?
It's definitely a job-shop variant. Usually we use the terms "release time" and "deadline". See the job characteristics list here: https://en.wikipedia.org/wiki/...
- 857
1
vote
Accepted
How to define the sequence depending setup time based on a time index formulation
Here is a way to model sequence-dependent setup times for a time-indexed formulation:
$$
\forall j, j' \in J, j \neq j' \quad
\forall m \in M, \quad
\forall t \in T, \qquad
x_{j, m, t} + \sum_{t' = t +...
- 2,401
3
votes
Accepted
Formulation for choosing how many items to manufacture
If you need both $x$ and $y$ in the model, a third option is to enforce
\begin{align}
y_{m,p,s} &\ge x_{m,p,s} \\
y_{m,p,s} &\le \text{PartsPerShift}_p x_{m,p,s}
\end{align}
This modification ...
- 29.8k
0
votes
How to fill the days in sequence?
\begin{array}{ll}
\text{minimize} & \sum_{i} y_i \\
\text{subject to} \\
& \sum_{i} h_i = 20 \\
& h_i \ge h_{i+1}, \forall i \in \{1,2,3\} \\
& 8y_i \ge h_i, \forall i \\
& h_i \...
- 116
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