[Ma8ee]

Exactly. It's just that they mix up the steps. The last step, the assembly, is highly automated and usually very fast in software production, since it is done by a compiler (and the aptly named, assembler). The people involved are doing engineering and design, which is much harder to control.

[AnimalMuppet]

Not even that. It's done by the CD duplicator (or, these days, by the web server).