Your introduction will provide the agency with basic but vital information, including who you and the company are. Below is an example of an introduction:
In essence, the introduction gives a good overview of the company and its markets. Your project may require more or less knowledge about the background of the company. The introduction may need to include any or all of the list of possibilities below:

• Who you are (if an individual) or who the company is, complete with brief history.
• The market(s) you operate in, their locations, size and type.
• Your products and services currently available.
• Your target customer, gender, age, role in client company (detail as applicable)
• Present situation of the project – for example, if there is an existing system in place, the statistics and limitations of that system, or if there is nothing currently in place, or an outline of a system has been approved.)
• Identify the project leader, and the sign-off approval chain.

The requirements section is the most important, and detailed part of your brief. It should be clear, concise and concentrate on the key objectives you wish to achieve for the project. Remember, at this stage, anything is still possible. Explain clearly what you expect to see as the outcome, but not the process to reach it. Challenge the agency to think a bit further, and provide you with the ideas.