Which best compares the tasks in Inventory Control and Quality Assurance careers? Both careers investigate products, but Inventory Control focuses on the integrity of products and Quality Assurance focuses on the quantity of products. Both careers involve making purchases for a company, but Inventory Control focuses on services and Quality Assurance focuses on raw materials. Both careers involve making purchases for a company, but Inventory Control focuses on raw materials and Quality Assurance focuses on services. Both careers investigate products, but Inventory Control focuses on the quantity of products and Quality Assurance focuses on the integrity of products.