'maintenance of the system' is correct and usable in written English.
You can use it when referring to the upkeep or servicing of a particular system, for example, a computer system. For example, "Regular maintenance of the system is important to ensure that it runs smoothly."
"Whatever money we have now, it has to go to the maintenance of the system.
There was wrangling after the outbreak about who was responsible for cleaning and proper maintenance of the system.
Most of the people who criticized me have a vested interest in the maintenance of the system.
provision for maintenance of the system to meet the changing needs of the executive branch in the future.
It should contain an overall approach to operation and maintenance of the system.
The successful application of CP depends upon the selection, design, installation, and maintenance of the system.
The genius of this system was in harnessing social capital for the maintenance of the system so that there was accountability and responsibility built into it.
We established three advanced characteristics of this control system: response speed, reliability and easy maintenance of the system.
a. Operation and maintenance of the systems on Israeli territory that supply Jordan with water, and their electricity supply, shall be Israel's responsibility.
But as populist governments removed incentives for investment and maintenance of the systems through policies that limited rate increases and management's leeway in hiring and firing, the region's telephone networks fell into disrepair and were nationalized.
Integrators provide the logical network connection, they are responsible for the development, installation and maintenance of the systems (e.g. authentication, addressing and security).
