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MTBF
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\( \left( {\sum \left( {start\; of\; downtime\left( {failure\; n + 1} \right) - start\; of\; uptime\left( {failure\; n} \right)} \right) } \right)/\left( {number \;of \;failures } \right) \)
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MTTR
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\( \left( {\sum \left( {end\; of\; downtime\left( n \right) - start \;of\; downtime\left( n \right)} \right)} \right)/\left( {number \;of \;failures} \right) \)
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MAD
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\( \left( {total\; number\; of \;annotations} \right)/\left( {total\; number\; of \;responses} \right) \)
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MTDV
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\( \left( {\sum \;response\; time} \right)/\left( {\sum \; document \;size} \right) \)
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MTSA
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\( \left( {\sum \;response\; time} \right)/\left( {total \;number \;of\; annotations} \right) \)
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ART
|
\( \left( {\sum \;response\; time} \right)/\left( {total \;number\; of \;responses} \right) \)
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