Commsion:

Contract:

Contractual - Involves a signed agreement with stated objectives. If you or the other party were to break any agreements you would be in breech of contract and could face legal action

Competitive:The professional advisor prepares the competition brief and may request the help of others to assist with various sections.

Formal:

Tender:The production company might find out someone is looking for a video. They put together a brief with a proposal and a budget and send it to the potential client. The client would look at all the different tenders they receive and choose the one they prefer.

Informal:More of a verbal agreement between parties with nothing official or in writing, less formal so to speak