Which of the following are all strategies for improving productivity in$$ services?

Part $2$

A$.$

process$$ focus, repetitive$$ focus, product$$ focus, and mass customization focus

B$.$

reduce$$ inventory, reduce$$ waste, reduce$$ inspection, and reduce rework

C$.$

$$separation$,$ self$-$service,$$ automation, and scheduling

D$.$

lean$$ production, strategy$-$driven$$ investments, automation, and process focus

E$.$

high$$ interaction, mass$$ customization, service$$ factory, and$$ just$-$in$-$time