audit case study: how to uncover suspect vendor transactions
TRANSCRIPT
HOW TO UNCOVER SUSPECT VENDOR TRANSACTIONS
AUDIT CASE STUDY
BACKGROUND
• Multi-billion dollar global defense contractor developing state-of-the-art systems
• 10,000+ employees • Global offices in North America, Europe and South America• 15 lines of business including technologies for defense,
homeland security and commercial aviation • Clients include government and private sector companies• Highly regulated
OBJECTIVES
• Company wanted to review purchase data over time to identify potential fraudulent patterns
• Fraudsters typically start by stealing small amounts within a “test phase” and gradually increase the amounts over time as their confidence (and greed) build
FRAUD INCREASES OVER TIME
PROCESS
• The company performed a time series analysis to search for acceleration in payments, starting with high-risk vendors, then look for patterns and investigate further
• To identify patterns over a period of time, audit team had to analyze over 5 years of data from tens of thousands of vendors
• Each data set contained multiple fields. • Narrowing the population would have been impossible
without the use of a data analytics tool
BIG DATA CHALLENGES
• Millions of records with multiple fields• Filtering based on risk
• Match with employee files- extensive data cleansing required
• Vendor type
• Transaction values
• Transaction volume
• Subjective risk assignment
RESULTS
• Extracted transaction data for 5 years by quarter for selected vendors
• Plotted transaction values against expected (fraud) trend• No exceptions identified!
• Lack of exceptions provides assurance that current internal controls are effective
• With process in place, can now repeat data analysis to ensure that fraud does not start
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HOW TO UNCOVER SUSPECT VENDOR TRANSACTIONS
AUDIT CASE STUDY
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