> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ctechnology.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Maintenance
> Maintenance schedule and rule management.
Maintenance focuses around individual maintenance schedules that consist of multiple rules.
These schedules can be assigned to vehicle types from your [vehicle taxonomy](/handbook/oem/vehicle-taxonomy), and will then automatically apply to all vehicles of that type.
## Maintenance schedules
The main maintenance screen shows all maintenance schedules with their associated vehicle types and rule counts.
A schedule can have multiple rules that define when maintenance should be performed.
Rules are either **distance-based** (e.g., every 10,000 km), **time-based** (e.g., every 12 months), or based on **operational hours** (e.g., every 500 engine hours).
When multiple rules are present, the closest "next due" rule will determine when maintenance is required.
Use **Add plan** to create new maintenance plans.
Detailed information about a maintenance schedule is shown in its details view.
This information includes a name (potentially translated into multiple languages), and a description.
## Maintenance rules
Each maintenance schedule can have multiple rules that define when maintenance should be performed.
The rules are presented as a long list including their name, description, and trigger conditions.
The following rule types are available:
* **Distance-based**: Trigger maintenance after specific odometer readings
* **Time-based**: Schedule maintenance at calendar intervals (weekly, monthly, annual)
* **Operational hours**: Trigger based on engine runtime hours
When multiple rules are defined, the closest upcoming maintenance event will be based on the vehicle's current data.
Clicking on the edit icon next to an (enabled) trigger condition opens the rule details view, where you can modify the rule's settings.
You can define:
* An **initial offset** to delay the first maintenance event (e.g., first service after 1,000 km or 3 months)
* A **recurrence interval** to set how often maintenance should be performed (e.g., every 10,000 km or every 12 months)
* A **tolerance** to allow early maintenance (e.g., 500 km or 1 month before the due date)
## Maintenance schedule sharing
Maintenance schedules can be shared with vehicles via your [vehicle taxonomy](/handbook/oem/vehicle-taxonomy).
Simply select the vehicle types you want to assign the schedule to, and save your changes.
## Maintenance partners
You can assign maintenance schedules to your service partners, allowing them to view and manage maintenance for vehicles assigned to them.
This functionality is currently only available for selected partners and will be available publicly in future releases.