Here is a typical way that program producers get their shows on public broadcasting. This should not be regarded as step-by-step instructions for producing a program that will be aired. There is no one "right" way.
Secure at least partial financing in order to produce the program.
Begin production. Depending on the scope of the program, you may complete production on your own, or you may require assistance from additional funders or a radio or television distributor.
If more funding is required at this stage, it may be appropriate to seek a grant from CPB and/or additional sources.