Consultants provide clients with levels of expertise that are financially feasible for the time period they need help. As well, clients can control their expenditures on consulting services by only purchasing as much services from the outside consultant as desired.

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Consultants provide their advice to their clients in a variety of forms. Reports and presentations are often used. However, in some specialized fields, the consultant may develop customized products for the client. Depending on the nature of the consulting services and the wishes of the client, the advice from the consultant may be made public, by placing the report or presentation online, or the advice may be kept confidential, and only given to the executives of the organization paying for the consulting services.

Pieter P. Tordoir (1995). The professional knowledge economy: the management and integration services in business organizations. p.140.