Network share
A server folder is added to AutoCAD’s support file search path, and everything in it loads at start-up. Shipping a new version means copying a file into the folder — which is why this is the most common route of all.
The moment the share is unreachable, none of the tools are there: on site, at home, when the VPN drops. Start-up also grows with the number of files in the folder, and the folder only ever grows — nobody wants to be the person who deleted a colleague’s tool.
Email and USB
Whoever wrote the tool sends the new version as an attachment or hands it over in person, and everyone copies it onto their own machine. No installation, no waiting for IT.
Nothing anywhere records who copied which version. The person on leave that day never receives the message and keeps working with the old version for months. The gap surfaces when the same drawing produces two different results, and the cause is found days later.
Logon script
IT writes a script that copies the files when a user signs in. It is central, auditable and runs without anyone remembering to do it — of the four routes, this is the one with the soundest administration.
Every change now goes through IT. The engineer who wrote the tool makes the fix in ten minutes and waits three days for it to reach anyone — and by the third day nobody raises a ticket for small fixes any more. The tool stays broken even though it is fixable.
Hands-on, machine by machine
A new engineer starts, or a machine is replaced, and somebody sits down and installs the tools one at a time. It is the surest way to know the setup is correct.
It costs a day, and that machine is already behind a week later. The only record of what is on which machine is the memory of the person who installed it — and that record leaves when they do.