Which training is most valuable to manufacturing maintenance?
Troubleshooting, logical troubleshooting. With the pressures typically found in maintenance, especially in more reactive settings, maintainers are under pressure to fix things quickly.
In my experience this can lead to a “try something and see” approach. How many times have people replaced good components, changed something that a previous shift already changed, or made an adjustment that made things worse? Once a maintainer can follow a logical troubleshooting path, then the rest is a matter of gaining experience and specific technical training.