The ABC company has decided to increase its its current customer service levels from the traditional $84\%$ of orders delivered within $3$ days to $94\%$ of orders delivered within $3$ days. The company is however concerned about the disruption in its global supply chain caused by the war in the Middle East and the rising cost of maritime shipping through the suez canal. What are the customer service measurement and related issues that ABC should consider before implementing its new customer service policies?