What is "Heijunka," and why is it important in Lean Manufacturing?

a$)$ Heijunka is a marketing strategy aimed at increasing brand visibility. It is important for reaching a wider audience.

b$)$ Heijunka is a production scheduling method used to level the type and quantity of production over a period. It is important in Lean Manufacturing because it helps reduce waste, minimizes inventory, and aligns production with demand.

c$)$ Heijunka is a financial strategy for cost management. It is important for controlling expenses.

d$)$ Heijunka is a human resources tool for employee development. It is important for enhancing workforce skills.