Library / First Principles Framework (FPF) - Core Conceptual Specification
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Source changed 2026-10-03 08:25:59 UTC · snapshot created 2026-10-03 08:26:43 UTC · last check 2026-10-03 08:35:10 UTC

F.9:12.1 - Service target and monitoring observation

A service team resolves two exact cells: the ITIL sense of an availability target and the SOSA sense of an availability observation. Profile P-SLO-OBS-v2 states a Measurement-evidence-for semantic relation: the observation sense concerns a measured availability quantity relevant to the target sense, while observation and target remain different kinds of claim. The profile names the endpoint readings, direction of the semantic relation, applicability to the cited editions, Boolean condition, and required quantity-definition dependency. Current meanings satisfy it, so Bridge b-slo-obs obtains.

The team next proposes use u-slo-check: compare one observation result with the target. Direction d-slo is observation-to-target; rule r-slo requires the same quantity kind, aligned windows, and the stated unit conversion; tolerance t-slo permits the named rounding loss but no quantity-kind change. A C.2.1 claim with EntityOfConcern b-slo-obs states affirmative polarity for <u-slo-check,d-slo,r-slo,t-slo>.

Because this is an ordinary bounded evidence use and no assurance claim is made, the team recovers the descriptive A.10 evidence-provenance path for the observation record, checks the independently established direct relations it cites, and states RelianceDisposition=pass only for u-slo-check. That supports reliance within its boundary. It does not make the SLO fulfilled, authorize acceptance, or prove that comparison Work occurred.