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The availability vocabulary the quote math depends on.

Four canonical tiers sit behind estimateQuote and validateSlaFeasibility. Each one fixes an availability target, a repair window, the credit owed on breach, and the price multiplier the quote facade applies. Read this as the rate-card key for every priced path.

Canonical tiers 0 controlled vocabulary

Peak availability 0.0% best effort

Fastest repair 0 min Premium target

Top multiplier 0.00× over the Standard base

Tier definitions

simulated · read-only

The four canonical SLA tiers. Each row names the tier and its stable identifier, the target availability with a nines label, the service credit percent owed on breach, the mean-time-to-repair target, the price multiplier the quote facade applies, and the tier description. The Standard tier is the baseline multiplier of one point zero.
Tier	Availability	Credit on breach	Repair target	Price multiplier	Description

How the facades consume these tiers

one vocabulary, two readers

estimateQuote

Reads priceMultiplier to scale the rate card. A path quoted under Premium carries a 0.00× multiplier over the same distance and port math as the Standard baseline; without a tier, the quote is byte-identical to the legacy direct-path price.

validateSlaFeasibility

Reads targetAvailability and mttrMins to decide whether a requested tier is deliverable on the proposed path. A route that cannot sustain the tier's availability or repair target returns a denial the design surface surfaces before checkout.

Templates and per-offer declarations live on the provider SLA surface. This page is the canonical tier set those templates bind to, not the published terms themselves.

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