The operating environment has now changed in ways the calendar model was never designed to handle. Loads have grown, infrastructure has aged, regulation has tightened, and the workforce that historically performed routine inspections is shrinking. The cost of unexpected failure has climbed accordingly, and the gap between what calendar-based maintenance delivers and what reliable operation requires is no longer one that utilities can ignore.
The Limits of Time-Based Inspections
Time-based maintenance applies the same schedule to every asset, regardless of how each individual unit has been performing. A transformer operating well within its design envelope is inspected on the same cycle as one subjected to repeated overloads, ambient extremes, and intermittent cooling issues. Two assets that present very differently in the field are managed as if they were identical.
A quarterly inspection regime gives crews four opportunities per year to identify a developing fault, which means an emerging hotspot or insulation issue can have months to mature before anyone walks past it again. The scheduled visit captures a single moment in time and tells operators very little about the weeks in between.
Physical inspections also place technicians directly into the conditions that make critical assets dangerous in the first place. Energized switchgear, transformers, and confined substation areas carry real safety risk for the crews performing the work, and that risk grows when inspections must be conducted at height, in extreme weather, or under accelerated timelines.
The Financial and Operational Cost of Failure
When a high-value asset fails unexpectedly, the cost extends far beyond the damaged component itself. Emergency response commands premium labour rates, requires expedited delivery on parts subject to long manufacturing lead times, and frequently involves collateral damage to surrounding equipment caught up in the failure. A single transformer failure can pull bushings, breakers, and protective relays into the repair scope, multiplying the bill several times over before the asset is back in service.
Operational consequences can be more painful than the direct repair costs. Unplanned outages immediately degrade reliability indices, which utilities are increasingly required to report against and, in many jurisdictions, result in financial penalties. Customer impact ripples outward when the failure touches critical facilities or large industrial loads, and the reputational exposure can shape regulatory relationships for years.
Safety is a category of its own. Catastrophic failures, including arc flash events, oil fires, and mechanical ejections, place both utility workers and members of the public at risk. The most severe incidents trigger formal investigations, insurance implications, and public confidence concerns that are slow and expensive to repair. None of these costs appear on the maintenance budget, but every one of them lands somewhere in the organization.
Recurring failures also distort longer-term planning. Budgets built around predictable refurbishment cycles get raided to fund emergency replacements, deferred maintenance accumulates, and the asset lifecycle data that drives strategic decisions becomes increasingly unreliable.
Condition-Based Monitoring as the Next Step for O&M Teams
Condition-based monitoring resolves these issues by replacing the calendar with data. Rather than inspecting on a fixed cycle, it continuously evaluates how each individual asset is actually behaving and triggers maintenance work when measurable changes in performance, temperature, or electrical signature indicate that intervention is warranted.
This is the operating principle behind the Enertics portfolio within Systems With Intelligence. The eM Saver hardware platform captures multivariate operational data from rotating and electrical assets, while the eM AISuite software platform applies machine learning and AI-driven analytics to detect anomalies, predict developing faults, and prioritize where attention is most urgently needed. Combined with the Touchless™ thermal and visual monitoring solutions long associated with SWI, the result is a continuous view of asset health that no inspection-based program can reproduce.
For O&M teams, the difference is substantial. Maintenance shifts from reactive and schedule-driven to planned, prioritized, and aligned with the actual condition of the asset base. Critical equipment lasts longer, emergency callouts decline, technician exposure to high-risk environments drops, and capital planning regains the predictability that unplanned failures have been eroding.
The maintenance practices that built the modern grid served the industry well, but they were designed for a different era. Condition-based monitoring is the next step in the digital transformation of utility O&M, and it turns asset health from a periodic guess into a continuous, defensible operational picture.
Bobby Sagoo is CEO of Enertics