How is it done?

Listen

first the marketing executive n client servicing executive will go to the company/client
under stand there needs(known as brief). Then a pitch is prepared after discussing with various
department(in the agency itself)then executive go n try to make the client understand how the whole
ad will go.
then process starts, the client feed back is taken, the executive come back n discuss with again with different departments.
i feel by this u must hve got the fair amount of idea..............

Normally it takes 10 steps:
1. Campaign starts with a client brief from client. This brief usually describes the objective of the campaign and some learning from the past. This brief is given to client servicing (or can be called account management).
2. Client servicing hands over the client brief to the planner within the agency. Client servicing usually adds to the client brief his point of view. The planner researches the subject at hand and rewrites the brief to make it into a creative brief. This brief contains consumer insights and creative starters besides all the facts given by client and client servicing. This is probably the most important step in the process. A great creative brief is 50% success.
3. Creative brief is given to creatives. Creatives are lead by a creative director, who has a birds eye view of creative work both within and outside of agency. He identifies the best team of copywriter and art director to work on the job. The working process from this point of view differs from agency to agency.
4. I usually let the creatives work on the job on their own. Than all creatives not only the assigned team works on the brief for an hour within a brainstrorming session where several ideas come up. These ideas are taken by the creative team and with the suggestion of the creative director the creative team starts working.
5. A this stage the creative duo of AD and CW starts the serious work. They spend most of the time further brainstorming and mocking up ideas and getting feedback from the creative director, the planner and client servicing. In this process the ideas are getting formulated and finally a winning idea prevails.
6. Once the media independent idea is cracked the creative team starts to come up with actual ads for different madia.
7. Creative is presented to the client. And, hopefully with some small changes it goes to production.
8. Photography, illustration, copywriting, filming, etc. takes place.
9. Campaign airs.
10. Agency gets paid.