Review one Meta budget-allocation brief

Use only the supplied brief and the rules below. Preserve Unknown. Do not infer account access, approvals, business constraints, current settings, exact daily spend, or campaign results. This is a recommendation review, not authorization to change an account.

Definitions and rules
CBO is common shorthand for campaign budget optimization; Meta calls its campaign-level budget Advantage+ campaign budget. ABO is common shorthand for assigning budgets to individual ad sets. Meta also documents ad-set budget sharing: up to 20% can be shared between ad sets in campaigns without a campaign budget. Verify the supplied sharing state before claiming budgets cannot transfer. Sharing on/off is separate from the daily/lifetime budget duration.

A campaign budget may fit when allocation is flexible, ad sets have comparable business value, and campaign-level results serve the goal. Separate ad-set budgets may fit an explicit business requirement for separate allocations, substantially different audience sizes/values, or incompatible optimization goals/bid strategies. Sharing can be considered only where its flexibility fits the stated constraint and account availability is established. None guarantees a result or exact spend. Low conversion volume alone does not prove ABO is better. Do not apply an invented minimum budget, 50-event requirement, fixed waiting period, or 20% editing rule.

Current Meta setup documentation requires the same budget type and bid strategy for campaign-budget ad sets, the same delivery optimization event for highest volume, and standard delivery. If a required setting is unknown, flag the exact eligibility question. Do not silently convert incompatible campaigns. Public documentation is not an observed account setting.

Daily budgets are spending targets with flexibility; equal budgets do not establish equal delivery or a randomized test. Do not turn a separate allocation requirement into a guarantee of minimum delivery, exact daily spend, or a hard cap. If the business constraint requires a strict cap, ask for the applicable native spending-limit mechanism and its verified scope rather than certify it from a daily budget.

Prechange preparation may be complete without actual delivery or CRM results. Keep planning status separate from change authorization and post-delivery interpretation. A simulated case grants no real permission.

For retrospective review, use amount spent and result counts only when the supplied account/entity, currency, acquisition/reporting window, timezone, attribution rule, and metric definition match. CRM evidence additionally needs cohort join, deduplication, qualification definition, maturity rule, outcome cutoff, and complete coverage. Missing or partial/immature CRM keeps qualified cost Unknown; do not substitute zero. Cost per outcome = matching spend / matching outcome count. A known zero denominator is undefined, not $0. Aggregate spend and outcomes only across non-overlapping same-scope rows. An observational cost difference does not identify a causal CBO/ABO winner.

Task
1. State the supplied business requirement in one sentence.
2. Return a planning recommendation: campaign budget; ad-set budgets with sharing off; ad-set budgets with sharing on; or Hold. Explain how the facts support it. If a setting is merely proposed, label it proposed and preserve current state Unknown.
3. List each required setting, supplied current/proposed value, source, gap, and owner/system to supply it. Do not invent missing owners.
4. Separately return change authorization: supplied and scoped, absent, or denied. Denied/absent authorization blocks execution, not discussion of a recommendation.
5. If post-delivery evidence exists, calculate matching raw/qualified costs and campaign totals where valid. Show formulas and exact scope. List unknown results and their first missing dependency. If none exists, say post-delivery review has not occurred and do not fabricate a report.
6. Give no more than five focused questions for the earliest missing decisions. For an empty brief start with business requirement, account/campaign scope, ad-set purpose/value, current budget/sharing settings, and objective/bid/optimization settings. Then identify remaining reporting requirements without inventing answers.
7. End with three next actions, each tied to the supplied actor or the system that holds the evidence. Do not instruct a live edit without scoped authorization.

Worked interpretation (fictional)
Two same-cohort ad sets spent $900 and $600 and produced 90 and 30 raw leads. Complete mature CRM evidence identifies 3 and 6 qualified leads. Raw CPLs are $10 and $20; qualified CPLs are $300 and $100. Aggregate spend $1,500 divided by 120 raw leads is $12.50; divided by 9 qualified leads is $166.67. The native cheaper lead source is more expensive per qualified lead. This is a quality signal to investigate, not evidence that another budget strategy would cause better results. Without complete mature CRM evidence, qualified CPL stays Unknown.

Sources and scope
Meta public documentation checked 30 October 2026:
https://www.facebook.com/business/help/458847204894307
https://www.facebook.com/business/help/343242619559352
https://www.facebook.com/business/help/190490051321426?id=629338044106215
https://www.facebook.com/business/help/220698029821552
Recheck current controls for operational use. This prompt reviews facts supplied by the reader and cannot inspect their account. Attach the completed blank brief after this text.