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Reference.org
Service-level objective
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<p>A service-level objective (SLO), as per the O'Reilly Site Reliability Engineering book, is a "target value or range of values for a <a href="/facts/Service_level/577Y7pM1">service level</a> that is measured by an <a href="/facts/Service_Level_Indicator/GXF5wBxw">SLI</a>." An SLO is a key element of a <a href="/facts/Service-level_agreement/lR2Gv0gv">service-level agreement (SLA)</a> between a <a href="/facts/Service_provider/m4lLh5u7">service provider</a> and a <a href="/facts/Customer/oGqcqmhf">customer</a>. SLOs are agreed upon as a means of measuring the performance of the service provider and are outlined as a way of avoiding disputes between the two parties based on misunderstanding. </p>