Building the software every derivative starts from: boot code and firmware, the board support, operating system support, middleware and libraries, and the SDK, toolchains and build system that let each product team configure and build its own software from the shared base.
This stage with its neighbours. Each row is a discipline active here, shaded by how mature its work is by the end of each stage.
The full lifecycle detail, with its charts, flows, tables and every section, is for registered members. Registration is free and takes a minute. You come back to this page afterwards.