Company training register
Keep one approved list of the tools, machines and policies your team works with. Everyone records their own experience level and the date their training was given.
Every machine, system and policy people need training on, in one place.
From “Not trained” to “Can teach others”, set by the person doing the work.
Record when each training was given, so refreshers are never a guess.
See who is covered on what, and where the gaps are.