# Maintenance Analytics

Use these questions to prepare for the Kanoa Maintenance certification exam.

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<summary>What do MTTA and MTTR measure?</summary>

MTTA is the time from creation to first response; MTTR is the time from starting work to completing it. See [Response and Reliability KPIs](../03-maintenance-analytics/1-kpis.md).

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<summary>One asset has a much lower MTBF than the rest. What does that suggest?</summary>

It fails more often, which makes it a candidate for more preventive maintenance or replacement. See [Response and Reliability KPIs](../03-maintenance-analytics/1-kpis.md).

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<summary>The Work Order Flow chart shows more work orders created than completed. What's happening?</summary>

The backlog is growing. See [Backlog and Labor](../03-maintenance-analytics/2-backlog-and-labor.md).

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<summary>Preventive work orders keep showing up in the older Backlog Aging buckets. What does that mean?</summary>

Planned maintenance is being deferred, often to fight breakdowns. See [Backlog and Labor](../03-maintenance-analytics/2-backlog-and-labor.md).

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<summary>Why are logged labor hours reported separately from time active and time to complete?</summary>

One measures work actually done, the other elapsed time. A work order open for days with little labor logged is waiting, not being worked. See [Backlog and Labor](../03-maintenance-analytics/2-backlog-and-labor.md).

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