Order Batching in Warehouses by Minimizing Total Tardiness: A Hybrid Approach of Weighted Association Rule Mining and Genetic Algorithms

Table 4

Notations of Algorithm 1.

𝐷	The database
𝑤	The set of item weights
𝐿𝑘	Set of large 𝑘-itemsets
𝐶𝑘	Set of 𝑘-itemsets which may be 𝑘-subsets of large 𝑗-itemsets for 𝑗≥𝑘
SC(𝑋)	No. of transactions containing itemset 𝑋
wminsup	Weighted support threshold
minconf	Confidence threshold
Size	Maximum possible large weighted itemsets