Ridgeline Grid's оriginаl substаtiоn-mоnitoring softwаre has a hard-coded limit of 200 simultaneous sensor connections, written directly into the source code. As the company adds substations, operators now have to file a change request and wait for a code change and redeploy every time the limit needs raising. A capacity-planning consultant recommends externalizing that limit into a configuration file operators can edit directly. What NFR-driven technique does this recommendation illustrate?