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The COO is one of the highest ranking members of an organization, monitoring the daily operations of the company and reporting to the chief executive officer directly.
The COO in some companies is also the president, but he or she is usually an executive or senior vice president.
The focus of the COO is on strategic, tactical, and short-term OM, which means he or she is responsible for the design, operation, and improvement of the systems that create and deliver the firm's products/services.