$.($a$)$ In supply chain operations, perfect order fulfillment is extremely important for customer satisfaction. What are the standards that a perfect order needs to meet? $($b$)$ How should your company achieve perfect order fulfillment in your supply chain operations if your company has over $200$ global suppliers and owns several famous brand name products that are being sold to over $1200$ different retail stores worldwide $($including the $800$ stores in the U$.$S$.)?$