Business professional is a person in a business who manage other people or resources as a professional in fields such as engineering, sales, manufacturing and finance. Work System can be defined as a system where business participants performing a business process using information, technology and other resources to produce products for internal and external customers. Framework is a set of ideas for organizing a thought process of a particular type of thing or situation. Model is a useful representation of a specific situation or thing. Model describes reality by ignoring some irrelevant details, which make a complex situation simpler for analysis.
System is a set of interconnecting components operate together to achieve a specific purpose.
A system consists of input and output, system boundary defines what is inside and outside the system. Outside the system is what we called environment where defined as everything pertaining to the system beyond the system boundary. The interconnecting components forming a system is called subsystem, where it operates at its own and might even contains other subsystems. Value-added chain is a set of business processes interconnected together that an organization uses it to create value for customers. Value-added chain includes primary processes where it directly creates value to an organization's customers, and support processes that add value indirectly by making it easel for others to perform the primary processes.