A Novel MILP Model for the Production, Lot Sizing, and Scheduling of Automotive Plastic Components on Parallel Flexible Injection Machines with Setup Common Operators

Table 3

Nomenclature for the model.

Index
l	Index setup-type operators l ∈ {1, …, L}
Data
slailj	Number of setup-type operators l required to setup the tool j on machine i
sclilj	Cost of type operator l to setup the tool j on machine i
slsl	Number of available workers of type operator l available
Decision variables
Siljt	1 if the tool j is setup by setup operator l on machine i during time period t; 0 otherwise
SAiljt	1 if tool j is set up by setup operator l on machine i during time period t and is not set up on machine i during time period t − 1; 0 if tool j is set up by setup operator l on machine i during time period t − 1