This can be a fatal error as far as the long-term operational survival of the project is concerned. Operation and maintenance do not happen by themselves. They have to be organised on a permanent and self-sustaining basis. Someone with the necessary skills has to be found, appointed and paid to take responsibility for following the necessary operating and maintenance procedures. The spare part inventory has to be managed and replenished.
User fees have to be collected and properly handled.
All this requires planning and administrative capacities at the institutional level. Simply running a few training workshops and hoping the imparted knowledge will stick is unlikely to achieve anything. Trained people need to practice their skills and have them refreshed on a regular basis otherwise the knowledge fades. In practice, if they are not able to earn an adequate financial return from their skills they either forget them or move to where they can use them profitably. One way of dealing with the repair and maintenance problem is to ensure that the number of installations is sufficient to provide the newly trained technicians with an adequate standard of living.