Rockwell Automation FactoryTalk Metrics User Guide - Manual (Page 64)

Chapter 3 Collecting Performance Data
• Scheduled breaks, meetings, etc.
• Planned maintenance.
• External conditions that prevent the machine from working,
such as being starved or blocked.
In FactoryTalk Metrics, Available Time is the result of two other
measures: Scheduled Availability and Monitored Availability.
Scheduled Availability is the expected availability that results from a
predictable shift schedule (including exceptions such as meetings or
planned maintenance).
Monitored Availability is the determination of machine availability
based on the real-time events that are occurring on the plant floor
(such as blocked/starved). Monitored Availability may override
Scheduled Availability to make a machine unavailable when it would
be available otherwise.
Because collecting accurate Available Time is so important, there are
several options within FactoryTalk Metrics for configuring both
Scheduled Availability and Monitored Availability. In addition,
overall Available Time can be configured to accumulate when both
the Scheduled Availability and Monitored Availability conditions
are true, or when only one of them is true. The methods used for
determining Available Time are configured separately for each
activity area.
The following approaches can be used to determine if a machine is
available:
• Defining a schedule (time pattern), which defines specific
periods of available and unavailable time that repeat into the
future, and which is subject to exceptions like holidays or
scheduled maintenance activities.
64 Rockwell Automation Publication PLTMT-UM001M-EN-P-June 2014