Having a one day intro might save you two weeks of the 6 - 36 month task of getting to know the code base.
Like ... it doesn't help that much. Mainly it saves some frustration of the build system is insane or the source code is spread out in mails, a hd and a floppy in a drawer or the current source state is broken and need to be reverted.
But if the original author is there to do a handover, the chances are the company is properly run and the work will be a breeze anyway becouse the code is good and well structured.
Like ... it doesn't help that much. Mainly it saves some frustration of the build system is insane or the source code is spread out in mails, a hd and a floppy in a drawer or the current source state is broken and need to be reverted.
But if the original author is there to do a handover, the chances are the company is properly run and the work will be a breeze anyway becouse the code is good and well structured.