product-analytics-and-measurement

name	product-analytics-and-measurement
description	Define observable, governed evidence for product outcomes through metric trees, event/tracking plans, instrumentation QA, and measurement governance. Use when defining product metrics, designing tracking plans, building event taxonomies, running product funnels or cohort analysis, setting up dashboard contracts, or auditing instrumentation quality. Do NOT use for statistical inference or experiment design (route to data-scientist), data pipeline implementation (route to data-engineering), data architecture decisions (route to data-architect), observability or infrastructure monitoring (route to site-reliability-engineering), or general business intelligence and dashboard building (route to BI tooling).
license	MIT
metadata	{"tags":"product-analytics, measurement, metrics, instrumentation, tracking-plan, event-taxonomy, funnels, cohorts, retention, adoption, dashboard-contracts, privacy-aware-measurement"}

Product Analytics and Measurement

A dedicated operating method for turning intended product outcomes into observable, governed evidence. This skill covers the full measurement lifecycle: from defining what success looks like through metric trees and leading/lagging indicators, to specifying how that success is tracked through event taxonomies and tracking plans, to verifying that the instrumentation actually captures what it claims.

Loading Guide

Load this skill when the task involves any of:

Trigger	What to load
Define product outcomes, North Star, or success metrics	SKILL.md + references/metric-tree.md
Design an event taxonomy or tracking plan	SKILL.md + templates/tracking-plan.md
Audit or QA instrumentation quality	SKILL.md + templates/instrumentation-qa-checklist.md
Build product funnels, path analysis, or cohort definitions	SKILL.md + references/metric-tree.md
Set up a dashboard contract or measurement governance	SKILL.md + templates/outcome-review.md
Resolve conflicting metric definitions across teams	SKILL.md + references/discovery-brief.md (ownership boundaries)
Design a privacy-aware measurement strategy	SKILL.md

When to Use

• You need to define measurable outcomes, metric trees, and leading/lagging indicators for a product (SaaS, internal tool, public service, or consumer).
• You need a tracking plan that specifies events, properties, identity resolution, session boundaries, data quality rules, and ownership.
• You need to verify that existing instrumentation produces trustworthy data.
• You need a dashboard contract that pins metric definitions, sources, refresh cadences, and ownership.
• You need a product outcome review cadence that ties measurements back to decisions.

When Not to Use

This skill does not replace:

• Data architecture — schema design, storage selection, data modeling at the infrastructure level belong to ../data-architect/SKILL.md.
• Data engineering — pipeline implementation, ETL/ELT, dbt models, and data quality monitoring at the operational level belong to ../data-engineering/SKILL.md.
• Statistical inference — experiment design, hypothesis testing, causal inference, and model selection belong to ../data-scientist/SKILL.md.
• Observability — system health, latency, error budgets, and infrastructure monitoring belong to ../site-reliability-engineering/SKILL.md.
• Business intelligence — dashboard building, report generation, and data visualization as an end in itself. This skill governs the measurement contract and metric definitions that feed BI, not the BI layer itself.

This skill also does not prescribe universal benchmark thresholds. Every metric target, retention curve, or conversion rate cited in outputs is labeled as contextual — tied to the specific product, market, stage, and business model under discussion.

Core Concepts

Metric Tree

A hierarchical decomposition of a North Star or primary outcome into its constituent drivers. Each node in the tree is:

• Observable — it can be measured from instrumentation or a defined data source.
• Actionable — a change in the metric suggests a specific product or operational response.
• Owned — exactly one team or role is accountable for its definition, collection, and interpretation.

The metric tree distinguishes leading indicators (predictive, sensitive to change) from lagging indicators (confirmatory, slow to move) and pairs every metric with at least one countermetric (a guardrail that detects adverse side effects). See references/metric-tree.md.

Event and Tracking Plan

An event is a recorded action or state change with a timestamp, actor, and properties. A tracking plan is the contract that makes events trustworthy:

• Event name and taxonomy — consistent naming conventions, versioned, with a catalog of standard events.
• Properties — typed fields with allowed values, required vs optional, and default behaviors.
• Identity resolution — how actors are identified across sessions, devices, and authentication states (anonymous id, logged-in id, merged identities).
• Session definition — timeout rules, activity boundaries, and cross-platform session continuity.
• Data quality rules — validation checks (null rates, freshness, cardinality bounds, distribution drift).
• Ownership — who defines the event, who instruments it, who consumes it, and who is paged when it breaks.

See templates/tracking-plan.md.

Instrumentation QA

Before a metric appears on a dashboard, the instrumentation that produces it must be verified. The QA checklist covers:

• Client-side — event firing on correct triggers, property values match UI state, no duplicate firings, no missing required properties.
• Server-side — event ingestion, transformation correctness, identity stitching, timestamp integrity.
• Pipeline — schema compatibility, no silent drops, latency within SLA, deduplication behavior.
• End-to-end — the metric computed from raw events matches the value observed through a manual product walkthrough.

See templates/instrumentation-qa-checklist.md.

Privacy-Aware Measurement

Every measurement design must address:

• Consent boundary — what is measured before consent vs after; what is never measured.
• Minimization — collect only what the metric requires; avoid speculative properties.
• Aggregation threshold — metrics reported only when the cohort meets a minimum size.
• Retention and deletion — raw event retention period; how measurement continues after data deletion requests.
• Jurisdictional awareness — note when metric collection crosses regulatory boundaries (GDPR, CCPA, etc.).

Dashboard Contracts

A dashboard without a contract is an argument waiting to happen. A dashboard contract pins:

• Metric definition — the exact formula, data source, and filter conditions.
• Refresh cadence — how often the dashboard updates and the acceptable staleness.
• Owner — who is accountable for accuracy and who to contact when numbers look wrong.
• Audience and decision — who consumes this dashboard and what decision it informs.
• Thresholds and alerts — when a metric value triggers investigation (not a universal benchmark, but a product-specific threshold).

Decision Cadence

Measurement without a decision cadence is measurement theater. This skill guides the rhythm:

• Daily — operational metrics, anomaly detection, automated alerts.
• Weekly — leading indicators, experiment readouts, funnel health.
• Monthly — outcome reviews, metric tree health, countermetric checks.
• Quarterly — North Star reassessment, metric tree restructuring, tracking plan deprecation.

Working Method

1. Start with the outcome, not the event. Define what success looks like and decompose it into a metric tree before designing any tracking.
2. Verify measurability before committing. If a metric cannot be observed from available or feasibly instrumented data sources, reject it — do not fabricate a proxy without documenting the instrumentation constraint.
3. Design the tracking plan as a contract. Every event has a defined owner, schema, quality rule, and consumer. No orphan events.
4. QA instrumentation before trusting the dashboard. Run the instrumentation QA checklist on every new or changed event before the metric enters a decision cadence.
5. Pair every metric with a countermetric. For every metric that drives a decision, define at least one countermetric that would reveal an adverse side effect.
6. Label every threshold as contextual. State the product, market, stage, and business model that the threshold assumes.
7. Review measurement governance periodically. Deprecate unused events, retire stale metrics, update metric trees when the product strategy shifts.

File Map

Path	Loaded when
references/discovery-brief.md	Understanding ownership boundaries and how this skill relates to existing catalog skills
references/metric-tree.md	Building or reviewing a metric tree, defining leading/lagging indicators, selecting countermetrics
templates/tracking-plan.md	Designing an event taxonomy or writing a tracking plan contract
templates/instrumentation-qa-checklist.md	Auditing or verifying instrumentation quality before trusting metrics
templates/outcome-review.md	Running a product outcome review or setting up a measurement decision cadence
evals/evals.json	Evaluating the skill's output quality across representative scenarios

Related Skills

Routes to (resolvable, existing skills)

• ../data-engineering/SKILL.md — for pipeline implementation, ETL/ELT, dbt models, and data quality monitoring at the operational level.
• ../data-scientist/SKILL.md — for statistical inference, experiment design, hypothesis testing, causal inference, and model selection.
• ../product-strategy/SKILL.md — for North Star definition, product vision, PMF assessment, and roadmap prioritization.
• ../go-to-market/SKILL.md — for growth modeling, CAC/LTV, cohort analysis by channel, and PLG/SLG funnel metrics.
• ../financial-modeling/SKILL.md — for unit economics, ARR/MRR, churn, NDR, and SaaS operating metrics definitions.

Feeds (prose references to skills not yet landed)

This skill produces measurement contracts, metric trees, and tracking plans that feed:

• product-roadmapping-and-portfolio — roadmap decisions grounded in measured outcomes.
• product-experimentation — experiment design and readout on a trustworthy measurement foundation.
• product-adoption — adoption funnels, activation metrics, and time-to-value measurement.
• conditional-customer-success — account health scores and customer outcome tracking.
• product-lifecycle-learning — post-launch learning loops and metric-informed iteration.