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Continuous Auditing and Monitoring

Evidence and testing · 3 min read

From yearly check-ups to a heart monitor

A traditional audit is like an annual check-up. It’s thorough, but a problem that starts in February might not be found until the next January. Continuous auditing is like wearing a heart monitor: automated checks run all the time, and the auditor hears about trouble within days.

Monitoring vs auditing

Continuous monitoring is done by management; continuous auditing is done by audit for independent assurance.

Continuous monitoring is done by management. It’s part of running the business: fraud monitoring tools, automated exception reports, risk dashboards, security alerts.

Continuous auditing is done by audit. It’s a way of gathering audit evidence regularly and automatically, so assurance is close to real time.

They connect. Where management’s monitoring is good, the auditor can evaluate it and rely on it, which reduces direct testing. But it never replaces the auditor’s own independent view.

Why bother?

  • problems are found sooner, before they grow
  • more transactions are tested, often all of them
  • it suits paperless, high-volume businesses such as banking, payments and e-commerce
  • auditors spend less time on repetitive testing and more on judgement

It needs highly automated systems, reliable general controls, audit tools that run without manual effort, and someone who acts on what’s flagged.

The online audit techniques

These are pieces of audit logic placed inside, or connected to, business systems. The exam usually describes what a technique does and asks for its name.

Audit hooks raise flags early, snapshots record a transaction's path, embedded modules collect transactions for later, CIS re-checks selected ones.
TechniqueWhat it doesThink of it as…
Audit hooksEmbedded routines that flag suspicious transactions so they can be looked at before errors growA smoke alarm
SnapshotsRecord images of a transaction at points along its processing pathPhotos at each stage of a journey
Embedded audit modules / SCARF (systems control audit review file)Code inside the application that copies transactions meeting audit criteria into a separate audit fileA filter that collects the interesting ones
Integrated test facility (ITF)A dummy entity in production; the auditor’s test transactions are processed alongside real onesA mystery shopper
Continuous and intermittent simulation (CIS)During processing, simulates the handling of transactions that meet set criteria and reports differencesA spot-check double-calculation

A simple way to tell them apart:

  • Flag suspicious things early, with little complexity → audit hooks.
  • Show the path or create an audit trail → snapshots.
  • Collect transactions for later audit review → SCARF / embedded audit modules.

Example. A bank sets up an audit hook that alerts internal audit whenever a payment over a threshold is released by someone who also changed the beneficiary’s bank details in the previous 24 hours. Auditors review each alert within a day, instead of discovering the pattern at the year-end audit.

How the exam asks about it

If the question asks…The answer is usually…
Main benefit of continuous auditingEarlier detection; more transactions tested
Prerequisite for continuous auditingHighly automated systems with reliable controls
Technique that flags suspicious transactions earlyAudit hooks
Technique that provides a transaction audit trailSnapshots
Who is responsible for continuous monitoring?Management
Can audit rely on management’s continuous monitoring?Yes, after evaluating it; it reduces but doesn’t replace audit testing

In short

  • Continuous monitoring is done by management as part of running controls. Continuous auditing is done by audit to give ongoing, independent assurance.
  • Continuous auditing shortens the gap between something happening and the auditor knowing about it.
  • It needs highly automated systems, reliable general controls, and audit tools built into or connected to the systems.
  • Audit hooks flag suspicious transactions for immediate attention. They're simple and catch problems early.
  • Snapshots record a transaction's values at each step, giving an audit trail.
  • Embedded audit modules (SCARF) collect transactions that meet audit criteria into a file for later review.
  • Continuous and intermittent simulation (CIS) re-checks selected transactions as they're processed.

Exam traps

  • Management's monitoring can reduce audit's testing, but never replaces the auditor's independent view.
  • 'Flag suspicious transactions early, with little complexity' → audit hooks.
  • Snapshot = audit trail of the path. SCARF = collecting transactions for later.
  • Continuous auditing needs automated systems; it doesn't suit manual, paper-based processes.

Slides

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CISA · Domain 1 · Evidence and testing

Continuous Auditing and Monitoring

Moving from once-a-year checks to near real-time assurance: the difference between monitoring and auditing, and the online audit techniques (audit hooks, snapshots, SCARF, ITF, CIS).

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