A Production Planning Model for Make-to-Order Foundry Flow Shop with Capacity Constraint

Table 1

Chromosome encoding.

Number	Coding name	Coding scheme
1	Production task coding	. The number is clustered according to a certain order to form an individual of the production task.
2	Production task process coding	. The number is clustered according to a certain order to form an individual of the production task process.
3	Material type coding	. The number is clustered according to a certain order to form an individual of the material type.
4	Decision variables	, . The proposed IGA is modified in two aspects: one is introducing two different evolution phases in the iterative process, and the other one is adopting different genetic operators in corresponding evolution phase. In order to divide the two different evolution phases clearly and accurately, the decision variables have been introduced and there are two conditions ( and ) for switching two phases. represents the number of successive generations; represents the profit rate of order.