Maintaining on a fixed schedule isn't the same as maintaining based on what the equipment's condition is actually telling you.
Both are legitimate maintenance strategies, and both show up side by side on real maintenance plans. The difference isn't "old way vs. new way" — it's what triggers the maintenance action. One triggers on the calendar or the hour meter, regardless of condition. The other triggers on measured evidence that the equipment actually needs attention right now. That single difference in trigger has real consequences for wasted component life, unexpected failures, and cost.