A cost system refers to the methods used to collect, analyze, and manage financial data related to the production and delivery of goods and services. There are several synonyms for cost system, including cost accounting, cost management, and cost control. Cost accounting involves the systematic recording, measurement, and analysis of costs, while cost management involves the identification, allocation, and control of costs to minimize expenses and maximize profits. Cost control, on the other hand, focuses on managing and reducing costs to achieve specific financial goals while maintaining quality and efficiency. All of these terms refer to the various strategies and tools used by businesses to ensure effective cost management and control.