What are the advantages and disadvantages of a committee structure?

"In committee structure, authority and responsibility are held by a group rather than an individual. Committees are typically part of a larger line-and-staff organization. Often the committee’s role is only advisory, but in some situations the committee has the power to make and implement decisions. Committees can make the coordination of tasks in the organization much easier. For example, Novartis, the huge Swiss pharmaceutical company, has a committee structure, which reports to its board of directors. The company’s executive committee is responsible for overseeing the business operations of group companies within the global organization and consists of the CEO, CFO, head of HR, general counsel, president of operations, head of biomedical research, global head of drug development, CEOs of the pharmaceutical and oncology units, and CEOs of Sandoz and Alcon, other Novartis companies. Members of the executive committee are selected by the company’s board of directors. Committees bring diverse viewpoints to a problem and expand the range of possible solutions, but there are some drawbacks. Committees can be slow to reach a decision and are sometimes dominated by a single individual. It is also more difficult to hold any one individual accountable for a decision made by a group. Committee meetings can sometimes go on for long periods of time with seemingly little being accomplished."