parallel run; parallel operation
Computing term for running multiple systems, programs, or processes simultaneously, often for testing or redundancy.
We check for problems by running the new system in parallel.
Parallel operation of servers can distribute the load.
Similar meaning, but 並列運転 emphasizes simultaneous operation of multiple units, while 並行運転 can also imply concurrent but independent processes.
Compound of 並列 (parallel) and 運転 (operation). A straightforward technical term with no obscure historical derivation.