a) List and explain the 5S Practices that serve as an enabler and essential foundation of lean systems. Why does the list of the 5Ss sometimes have seven elements?

b) Daily usage of a product is 10 in a facility that operates every day of the year. Setup cost is $68 and annualized carrying cost is $100. Daily production of this product is 20. Lead time is 14 days; safety stock is one day's production. What is the optimum kanban size, and number of kanbans?