Skip to content
Time-Based vs. Hours vs. Kilometers Maintenance: When to Use Each Model
Preventive Maintenance

Time-Based vs. Hours vs. Kilometers Maintenance: When to Use Each Model

A clear comparison between calendar-based, operating-hours, and kilometer-based maintenance, with real-world examples from actual operating environments.

April 3, 20269 min read

The Common Mistake With Unified Schedules

Applying a single maintenance schedule to every asset usually drives extra cost or sudden breakdowns. Each asset wears differently based on the nature of work and the environment.

The right schedule starts with understanding usage patterns: does the asset run continuously? Does it cover long distances? Is the operating environment harsh?

When to Use Each Criterion

Choosing the right criterion is what separates smart maintenance from random maintenance. You can also combine more than one criterion for the same asset.

  • Calendar-based: best for low-usage assets
  • Operating hours: best for heavy equipment
  • Kilometers: best for vehicles and transport
  • Hybrid model: triggered by whichever condition hits first

A Gradual Rollout Without Disrupting Operations

Start with the top 20% of assets most critical to operations, then scale the model gradually. This way you improve results without overloading the team.

With TAC Flow you can configure multiple alerts for the same asset and document compliance inside a unified log.

Want to apply these steps to your fleet?

The TAC Flow team helps you turn these practices into a clear daily operating routine inside your company.