Design:

to create, fashion, execute, or construct according to plan
to conceive and plan out in the mind
to have as a purpose
to devise for a specific function or end

Develop:

to set forth or make clear by degrees or in detail
to make visible or manifest
to elaborate (a musical idea) by the working out of rhythmic and harmonic changes in the theme
to work out the possibilities of <develop an idea>
to create or produce especially by deliberate effort over time <develop new ways of doing business> <developsoftware>

Facilitate:

to make easier
help bring about

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