How to conduct a marketing audit.

The marketing audit is a fundamental part of the marketing planning process. It is conducted not only at the beginning of the process, but also at a series of points during the implementation of the plan. The marketing audit considers both internal and external influences on marketing planning, as well as a review of the plan itself.

There are a number of tools and audits that can be used, for example SWOT analysis for the internal environment, as well as the external environment. Other examples include PEST and Five Forces Analyses, which focus solely on the external environment.

In many ways the marketing audit clarifies opportunities and threats, and allows the marketing manager to make alterations to the plan if necessary.

Reference: http://entrepreneurs.about.com