Mass producing my electronics/raspberry-pi idea - What are the steps?
Just a list of the main steps I went through:


Product concept.
Features selection and limitation.
Component selection, mainly CPU and big peripherals.
Schematic entry prototype.
PCB design prototype.
Writing, testing &amp; debug real-time embedded code.
Writing, testing &amp; debug development GUI.
Assembly prototype.
Re-design schematic final product.
PCB design final product.
Assembly prototypes final products.
Updating, testing &amp; debug real-time embedded code.
Updating, testing &amp; debug development GUI.
Selecting Chinese manufacturer.
Interfacing with Chinese manufacturer.
Preparing manufacturing files (e.g. Pick and place coordinates).
Schematic entry Test-jig.
PCB design Test-jig.
Writing, testing &amp; debug Test-jig self test code.
Writing self-test failure analysis manual.
Writing, testing &amp; debug Manufacturing self-test GUI.
Arranging for EU EMC conformity testing.
Arranging for EU ROHS certificate.
Negotiating for EU WEEE directive.
Applying for Registered Trademark.
Arranging EU/UK import registration.
Arranging packaging.
Mechanical outfitting Test-jig.
Writing manual.
Writing, testing &amp; debug Drivers for C.
Writing, testing &amp; debug Drivers for Python.
Making You-tube instructions &amp; advertise movies.
Registering and and setting up webpage
Adding &amp; testing last minute extra features.
Programming and shipping first 1250 products.


And then you have to set aside plenty of time for customer questions, updates, complaints, returns etc. for the next four years.