{"id":"EXP-010","area":"Measurement and Experimentation","title":"Distinguish single-variable and package tests","if":"several material variables change together","then":"classify the intervention as a package test OR separate variables for causal learning","else":"treat it as a focused test","operators":["IF","OR","THEN","ELSE"],"laka_levels":["Minor","Major","Structural"],"primary_metric":"attribution confidence","guardrails":"slow recovery","rationale":"Makes the decision explicit, measurable, and reversible where possible.","prefix":"EXP","area_slug":"measurement-and-experimentation","source":{"document":"04","file":"04-IF-ELSE-AND-OR-RULEBOOK.md","heading":"EXP-010 — Distinguish single-variable and package tests","anchor":"exp-010-distinguish-single-variable-and-package-tests"},"sentence":"IF several material variables change together THEN classify the intervention as a package test OR separate variables for causal learning ELSE treat it as a focused test","area_detail":{"name":"Measurement and Experimentation","slug":"measurement-and-experimentation","prefix":"EXP","count":12},"governs_gates":["measurement"],"precedence":["safety_law_privacy_policy","user_value_and_accuracy","technical_eligibility_and_canonical_correctness","business_value_and_constraints","intent_fit_and_information_quality","measurement_and_learning","efficiency_and_scale","cosmetic_optimization"],"neighbours":["EXP-001","EXP-002","EXP-003","EXP-004","EXP-005","EXP-006","EXP-007","EXP-008","EXP-009","EXP-011","EXP-012"],"levels":[{"id":"minor","name":"Minor","definition":"Surface elements change while the object and mechanism stay mostly stable.","examples":["Examples:","title wording","meta description","opening answer","anchor text","image compression","small internal-link addition","CTA wording"],"rule_count":29,"source":{"document":"01","file":"01-SEO-LAKA-GRAMMAR.md","heading":"10.2 Minor change"}},{"id":"major","name":"Major","definition":"The document or campaign is substantially improved, but its role remains stable.","examples":["Examples:","rewrite the page","add original evidence","change format from prose to comparison table","build a video or calculator into the page","consolidate weak sections","launch a focused outreach campaign"],"rule_count":53,"source":{"document":"01","file":"01-SEO-LAKA-GRAMMAR.md","heading":"10.3 Major change"}},{"id":"structural","name":"Structural","definition":"Relationships, architecture, ownership, or workflow change.","examples":["Examples:","merge cannibalizing pages","redesign cluster architecture","change templates","repair faceted navigation","move from isolated pages to a hub graph","connect CRM value data to SEO reporting"],"rule_count":62,"source":{"document":"01","file":"01-SEO-LAKA-GRAMMAR.md","heading":"10.4 Structural change"}}]}