This occupation field is to do with the managing of a department or a business. Effective managers are good planners, they are good organisers, and are able to influence others positively so that goals are achieved and targets are met. Effective managers have a strong self-belief, they have lots of energy, an optimistic outlook. A person cannot become a manager without the necessary qualifications and experience. Managers on the highest level in the corporate world have a good knowledge of accountancy, economics, commercial law and other specialised knowledge. In addition to the qualifications they possess a sound knowledge of the business, which can only be attained over a period of time. Managers in specialist areas of expertise are some of the fastest growing and most challenging - these include: Marketing Manager, Production Manager, Hotel Manager, Human Resource Manager, etc.