Workflow illustration / graphic

I need two graphics. Each to demonstrate a three step process. The graphics must be professional business images not childish cartoon images. The outputs should be scalable and should include the usual low quality jpeg/png/gif and high quality ai/eps type formats.

A more detailed briefing including our corporate colours, etc will be provided to the winning bidder. Bidders should point me to an example(s) of a similar job they have completed.