Prerequisites

• Access to the Configuration > General parameters (SP019) menu.
• Access to the Management > Collection tracking (SP004) menu.
• Planned collection

Introduction

In the SPC context, the event log is a mechanism for tracking and traceability. It allows data to be analyzed in relation to standards or set limits. Any event that do not meet the expected standard generates an occurrence in the log.

To configure an event log, it is necessary to define its rules first: a set of conditions and parameters that determine how the events and occurrences will be recorded and monitored throughout the production process.

Event log rules

The event log rules are applied to the characteristics of the variable and attribute types, divided into three major groups:

• Occurrences: they are triggered when an unexpected event occurs. For example: when a point out of the executed control limit is out of the deadline (only occurs when a frequency is set for the collection).
• Sequences: they are triggered when a point sequence begins a pattern. For example: a sequence of "X" consecutive points, alternating above and below the central line.
• Values: they are triggered upon crossing a certain value. For example: "CPK lower than" and "PPK lower than".

A rule can be applied to all data collections or to specific ones.

Below, see an example for each situation:

Configuring event log rules for all collections

1. Access the Configuration > General parameters (SP019) menu.

2. Access the Event log tab.

3. Select the desired rules and, if necessary, edit the values that were automatically inserted.

4. Click on the Replicate changes button to apply the selected rules to other collections created in the system.

5. Click on the button.

Configuring event log rules for a specific collection

1. Access the Management > Collection tracking (SP004) menu.

2. Select the desired collection and click on the button.

3. On the collection configuration data screen, click on the Characteristic tab.

4. Select the desired characteristic and click on the button.

5. On the characteristic data screen, access the Event log tab.

6. Select the desired rules and, if necessary, edit the values that were automatically inserted.

7. If you wish to replicate the values to other rule groups on the same screen, click on Copy to save the selected configurations and then on Paste.

8. To finish, click on the button.

Conclusion

The rules for activating the event log are essential to ensuring that critical process performance information, such as deviations or failures, is captured precisely and in a timely manner.

The next step is to determine the situations that will be monitored and recorded by the system. To move forward, refer to the Configuring occurrences article.