In Lean management, Work activities are categorized into:

a$.$

Value Added, Non$-$Value Added but Necessary, and Waste

b$.$

Value Added, Non$-$Value Added, and Waste

c$.$

Value Added, No Value Necessary, and Waste

d$.$

Value Added, Non$-$Value Added, and Necessary Waste

e$.$

Value Added, Non$-$Value Added, but Necessary Waste