Videojet DataFlex 6530 Service Manual - Rev AA F-1
Appendix F Availability
F.1 Overall Equipment Effectiveness - Availability Tools
F.1.1 Introduction
The ‘Availability’ tool helps to isolate operational versus equipment issues and allows the user
to track the equipment downtime and view the downtime statistics.
The pareto of faults that allows the analysis of runtime measurement data, helps the user to
understand and eliminate the more frequent causes of both equipment and operational
downtime.
The availability shows two basic availability metrics simultaneously:
• Equipment Availability
• Operational Availability
Equipment availability is the same and equal or more than operational availability.
Note: Operation Availability can be changed between two separate production time proxies as required by
the user: "Power On" and "Running" mode. For more information, refer "Operation Availability"
on page F-2.
F.2.2 Equipment Availability
Where,
‘Equipment Total Time’ is the total amount of time for which the equipment is turned On (has
power applied). If the equipment is powered down when a fault is active, the equipment total
time also includes the amount of time for which the equipment is off.
‘Equipment Downtime’ is the amount of ‘Equipment Total Time’ the equipment has spent in a
‘Equipment Fault State’. ‘Equipment Fault State’ is defined as the period where the equipment is
not available due to a fault, identified as a equipment fault.
When the equipment enters a equipment fault state, the downtime counter starts. The
equipment remains in this equipment fault state until the fault is cleared. If the equipment is
powered down in a equipment fault state, the downtime counter continues until equipment is
powered on and the fault is cleared.
Equipment Availability = 1 -
Equipment Downtime
Equipment Total Time
Equipment Total Time
=
('Power On' time) + ('Power Off' time in fault
state)
Equipment Downtime
=
Equipment Total time in a fault state
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