The same faults keep coming back to the same few people.
A handful of senior experts hold the know-how, and they can't be on every site, in every time zone, at once. The same problems get solved over and over — by your most expensive, least available people.
When the experience isn't there, everything escalates.
A junior technician, a service partner, or a customer's operator hits a fault they can't place, so they escalate it back to you. A problem that could have been solved in minutes becomes a call, a dispatch, and hours of downtime.
The manual never had the real fix in it.
It's dense, monolingual, and out of date the moment the machine ships. How your best people actually diagnose and repair the machine never left their bench.
The bigger the network, the harder consistency gets.
Every new site, partner, and region is another place your service knowledge has to reach — in the same quality, in the right language. As the installed base grows, the gap between your best experts and everyone else widens.