Suggested Response - Q2

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a. Draw a diagram illustrating all the maintenance triggers and how they are related to the four types of maintenance approaches.

b. Using a table, briefly describe each trigger and provide an example of the trigger from within the brewery.

Response:

a. To initially answer the question, we should first create a flowchart similar to the following, which contains all four maintenance approaches and clearly links the associated maintenance triggers for each category:

 

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b. Using a table, briefly describe each trigger and provide an example of the trigger from within the brewery.

 

 

Trigger

 

Description

 

Reference Examples

Breakdown

Maintenance is initiated upon equipment or component failure.

A chilled water pump coupler breaks.

Circuit board on a VFD blows a capacitor.

Time

Maintenance occurs upon a time-based interval (e.g. weekly, monthly, quarterly, annually).

Lubricate malt mill roller bearings monthly.

Usage

Maintenance is deployed after a threshold of use has been reached

Perform a boiler blow-down based on run hours.

Rebuild mixproof valve based on number of actuation cycles.

Event

Maintenance takes place after abnormal circumstances have occurred.

Boiler shutdown, drain, and internal inspection after water pre-treatment system failure.

Condition

Maintenance is scheduled upon detection of an abnormal or deviating process condition.

Elevated pump vibration.

Increased variation in steam header pressure.
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