The trend projects the disk arm utilization for the next three months.
The backward slash (dark green) in the bottom shows the level of peak disk arm
utilization that is considered acceptable.
The crosshatch (yellow) in the middle shows the level of peak disk arm utilization that is
considered marginal.
The forward slash (dark red) at the top shows the level of peak disk arm utilization that is
considered critical.
The pink diamond on the trend months shows the calculated peak disk arm utilization
based on the utilization of the last three months.
The blue square shows the calculated peak disk arm utilization based on the utilization of
the last six months.
The yellow star shows the calculated peak disk arm utilization based on the utilization of
the last 12 months.
The information under the Facts heading, at the bottom of the graph, shows the recommended
guidelines for marginal and critical peak percentage. It also indicates the number of months
before this system reaches the guideline.
Through the Customize Graph function, the graph may be re-drawn for up to the last 24 months if
data is available.
PM for Power Systems Graph Reference Document
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