Precision Modelling with Blender for architecture

We have tutorials since 2008 on Precision Modelling with Blender for architecture by Yorik in https://yorik.uncreated.net/tutorials/precisionmodelling-blender.html
Why architects should explore on Blender: http://blendermama.com/why-blender
Related link:
https://blenderartists.org/forum/showthread.php?403082-Precision-Modeling-in-Blender-Tools-and-Addons-free-ebook-available
http://pdfsr.com/check_download/precision-modeling-in-blender-tools-and-addons