Wall to wall are measured from outside point top and bottom the inside measurement is taken point to point. In residential cabinetry it's a 1/2 on each side and in commercial it can be up to 2".
In residential we use scribe in commercial we will cut fillers to what's needed if straight or angled.
In commercial you may make 12", 18",24",30"36" etc. Most aren't making 7" or 13" cabinets. On say a 12' run you'll gI've 2" on each end because they tend to grow when installed. Rarely will there be blind corners unless specified I the drawings for a commercial kitchen.
I don't make things fit when I build. It's already been decided in the drawings...
When I started in 1983 as a professional. All cabinet were run to the longest point and fitted perfectly., but we had so fits there or where built I to the cabinets back then..
WillemJM....Forums have been the same since I've been on them. There's always going to be opinion differences. I've worked in one man shops and with a hundred.. Furniture makers are a bit quieter, but cabinet makers, there a rowdy group.
Yes.... I can be difficult, but I enjoy talking with other cabinet makers. Cabinet makers are either Democrats or Republics in my view,. We either agree or dont. Lol