A Computerised Maintenance Management System (CMMS) is the system most maintenance teams use to manage their work. This article explains what a CMMS actually does, where it adds value, where its limits are, and how structured fault diagnosis and engineering knowledge complement it rather than replace it.

What a CMMS does

A CMMS is primarily a records and workflow system for maintenance activity:

  • Assets — a register of the equipment being maintained, with details and hierarchy.
  • Work orders — the record of work to be done or done: what, where, who, when, priority.
  • Planned / preventive maintenance (PM) — schedules for routine inspections and servicing, generated automatically on a calendar or usage basis.
  • Reactive maintenance — logging of breakdowns and call-outs.
  • Spare parts — inventory of critical spares, stores and (sometimes) purchasing.
  • Maintenance history — a record of what has been done to each asset over time.
  • Reporting — KPIs such as downtime, PM compliance, mean time between failures, cost.

Where a CMMS is strong

A CMMS is excellent at managing maintenance: making sure work is scheduled, assigned, tracked and reported. It is the system of record for assets and work orders, and it gives managers the visibility to plan and justify maintenance activity.

Where a CMMS has limits

A CMMS records that a fault occurred and that it was fixed, but it typically does not capture the reasoning — the sequence of checks, the logic, the decision between causes. The work order closes with a short resolution note, and the diagnostic knowledge that got the engineer there often leaves with the engineer. When the same fault recurs next month, the work order system shows that it happened before, but not how it was diagnosed.

How Wiresight complements a CMMS

Wiresight does not replace a CMMS. Your CMMS remains the system of record for assets, work orders and PM schedules. Wiresight adds the structured fault diagnosis and the engineering knowledge layer on top:

  • A reusable, structured diagnostic procedure for each fault type.
  • A captured history of how each fault was actually resolved — the checks, the cause, the parts.
  • Consistent logic so less experienced engineers follow the same path your experts do.

The two work well together: the CMMS triggers and tracks the work order; Wiresight supplies the diagnostic logic and captures the reasoning so the next work order is faster. See CMMS integration and industrial maintenance software.

Key points

  • A CMMS manages maintenance activity; it does not by itself capture diagnostic reasoning.
  • Wiresight complements a CMMS — it adds structured fault diagnosis and knowledge capture.
  • The two together mean a recurring fault comes with a documented path to the cause, not just a closed work order.