Events
Use events to set a marker on the x-axis of your chart. Events can be anything you want to visualize in a chart, such as the replacement of a reagent, an adjustment to an SOP, or the recalibration of an instrument.
Specify a date and time for the event, add a remark to describe the event, and use colors to distinguish between different events. In the resulting chart, you can quickly ascertain if and how your process was impacted by the change.
The following image from the '02 Plotting Manual Input' sample
document shows how an event can be used when working with non-assay data. The event
indicates the recalibration of a machine that is used to produce screws.
Note: You can also reference events in rule sets to make sure that accompanying
changes to control rules stay synchronized.