GA4 Data Integrity Audit — 47-Point Diagnostic + Dev-Ready Fix Plan

Business Question: How much ad spend is your business misattributing right now — and what would it cost you in 12 months if nothing changes?

The Problem

Most businesses lose 20–40% of their conversion data due to broken GA4 tracking. Silent failures in GTM, cross-domain setup, and event schemas produce confident-looking reports built on corrupt data — contaminating Google Ads smart bidding and marketing decisions.

What This Audit Delivers

Deliverable	Format	Audience
Executive Summary PDF	PDF	CMO / Marketing Director
47-Point Diagnostic Matrix	Google Sheets	Analytics Manager / Ops
Developer-Ready Fix Tickets	XLSX / Jira-ready	Engineering / Dev Team
QA Monitoring Dashboard	Looker Studio	Ongoing retainer

Methodology — PIMS-Style (Inspect → Assess → Remediate → Prevent)

Adapted from Chemical Engineering Pipeline Integrity Management Systems. Data tracking is treated as a physical pipeline: find the leak, assess severity, fix the valve, build the sensor.

Audit scope:

• GTM container configuration review
• GA4 event schema validation (47 checkpoints)
• Cross-domain tracking integrity
• Conversion funnel step-by-step verification
• UTM parameter channel integrity
• Shopify / e-commerce purchase event deduplication
• BigQuery export configuration check

Sample Outputs

Diagnostic Matrix (Pass / Warn / Fail scoring)

Developer-Ready Fix Tickets

Looker Studio QA Monitoring Dashboard

Executive Summary PDF

Stack

Hire Me

Available for GA4 audit engagements on Upwork — $149 fixed-price entry audit, 5-day delivery. View my Upwork profile →

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Advanced Diagnostic: For a full mass balance reconciliation pipeline using FMEA leak classification and FULL OUTER JOIN architecture, see the GA4 ↔ Shopify Mass Balance Monitor.