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Procurement, sourcing, and contract partners

Evidence that supports a decision

Separate assurance artifacts from configured-system evidence.

The short answer

Evidence is useful only for the claim and scope it actually supports. A provider report can describe provider controls, an agreement can establish obligations, configuration evidence can show tenant settings, and application tests can show behavior. None substitutes for all the others.

01

Start with the claim

Do not collect documents until you know what must be proven.

Evidence review begins with a precise claim: the purchased plan includes a support target, a named tenant setting is enabled, a particular application denies unauthorized access, or a restore procedure works within the required time.

The stronger the claim, the more specific the evidence must be. A provider marketing page may show that a feature exists. It does not show that TDE purchased, enabled, configured, tested, or governs that feature.

The evidence reasoning chainA decision is traceable when every link is visible.
01ClaimState exactly what is believed or requested
02ArtifactIdentify the source, date, scope, and owner
03AssessmentExplain what the artifact proves and does not prove
04DecisionRecord authority, conditions, gaps, and next review trigger
02

Build cumulative confidence

Different artifacts answer different questions.

Provider assurance, contract evidence, tenant evidence, application evidence, and operating evidence should reinforce one another. They do not collapse into a single compliance label.

Procurement is especially well placed to preserve executed agreements, order forms, amendments, and service commitments. Reviewers still need technical and operating evidence from the teams that configure and use the service.

Five evidence layersConfidence is cumulative. Each layer has a distinct owner and question.
01Public informationWhat the provider says is generally available
02ContractWhat the parties agreed for the purchased scope
03Provider assuranceHow provider controls were independently or formally assessed
04Tenant and applicationHow TDE configured the service and how the application behaves
05OperationsWhether monitoring, support, recovery, review, and change processes work
03

State confidence honestly

A gap label is more useful than a confident guess.

Use MISSING when a required artifact or decision does not exist. Use INSUFFICIENT when something exists but cannot support the complete claim. These labels are not failures. They tell the decision maker what remains uncertain and what evidence would change the assessment.

Restricted provider evidence may have contract, portal, confidentiality, or nondisclosure limits. Record its identity, scope, date, custodian, and assessment without copying protected details into public learning content or unrelated review packages.

  • Prefer executed terms over general product pages for contractual commitments.
  • Prefer current exports or screenshots over recollection for tenant settings.
  • Prefer tested results over feature availability for application control claims.
  • Preserve dates, plan tiers, scope limits, exceptions, and review periods.
  • Do not treat a draft, template, empty record, or requested artifact as completed evidence.

The Ember lens

Ember's evidence set contains a mix of confirmed provider-role direction, draft architecture and standards, provider evidence, tenant evidence, operating statements, and open gaps. Procurement should preserve the provenance and restrictions of contract and provider artifacts while avoiding claims that those artifacts approve the Ember platform or a specific application.

Responsibility remains

Procurement owns the integrity and availability of purchasing and contract records within its authority. Technical teams own tenant and application evidence. Operations owns evidence of support and recovery practice. Decision authorities remain responsible for conclusions and conditions.

Apply it

Build a claim-to-evidence map

A vendor response says, 'Enterprise customers receive a 99.99% SLA, daily backups, and industry-standard security.' Decide what can be used now and what must be requested.

  1. 01Split the response into separate availability, backup, and security claims.
  2. 02For each claim, record whether the source is marketing, public terms, executed agreement, assurance, configuration, or test evidence.
  3. 03Identify the exact plan, service, region, exclusions, measurement method, and review period needed.
  4. 04Name the tenant or application evidence required to show TDE enabled and tested the relevant capability.
  5. 05Label each current claim PROVIDED, MISSING, or INSUFFICIENT and explain why.

Check your understanding

Make the ideas usable

2 questions
01Which artifact best proves that a particular Ember application blocks an unauthorized user from another user's record?
02A public support page lists response targets, but the purchased plan and executed terms are unavailable. How should the contract claim be labeled?

Source trace

Reviewable by design

Content owner: Wesley Almeida
Last reviewed: 2026-08-18

  • Ember Learn content model and backlog05-projects/vibe-coding-platform/resources/learning/ember-learn-content-model-and-backlog-2026-08-11.md
  • Ember reference architecture and evidence status draft05-projects/vibe-coding-platform/resources/diagrams/platform-reference-architecture-and-data-flow-draft-2026-07-13.md
  • Restricted provider evidence handling rules05-projects/vibe-coding-platform/resources/vendor/README.md
  • Public Supabase support and SLA source note05-projects/vibe-coding-platform/resources/vendor/supabase-public-support-policy-sla-source-note-2026-07-07.md