Data Cleansing and Why it’s Important to Get it Right

data cleansing

Does your organization have a data cleansing strategy? Each person generates massive amounts of data daily, whether through online purchases, streaming platforms, or just everyday browsing habits. Statista predicts that global data creation will reach more than 180 zettabytes by 2025. 

This data is incredibly valuable to businesses as they use it for marketing purposes, customer segmentation, and user behavior analysis. So with new information constantly coming in, how can we ensure that the data is valid, up-to-date, and accurate? 

The answer lies in data cleansing. Without this, you risk making decisions based on wrong or incomplete information. Let’s look at what this process entails and why it’s crucial to get it right. 

What is Data Cleansing?

Data cleansing, also known as data scrubbing or data wrangling, refers to the process of identifying and removing inaccurate or redundant records from a database. It ensures that any reports generated by the system are accurate and up-to-date.

The process involves examining each record in the database for accuracy, consistency, completeness, validity, and conformity with other existing records. Any errors found will then be corrected or removed from the dataset. It can also involve integrating new datasets into existing ones if they have overlapping data points. 

How Data Cleansing Works

Data cleansing requires a multi-step process to ensure the accuracy of the dataset. This is the backbone of your data cleansing strategy.

1. Identifying Data Issues

The first step is to identify any potential problems with the data. This can include checking for duplicates, missing values, or incorrect field entries. Suppose a customer’s address contains an invalid zip code, or their contact information is incomplete. In that case, this will need to be corrected before it can be used in reports or other analyses.

2. Cleaning the Data 

Once the issues have been identified, the next step is to clean up the data. This involves correcting any errors or filling in missing values by either manually inputting them or using automated tools.

3. Verifying Cleanliness

The final step is verifying that all the records are now accurate and up-to-date. This can involve running tests on sample datasets, comparing results with existing ones, or using visualizations such as charts and graphs to ensure accuracy. 

Why Businesses Need A Data Cleansing Strategy

Data cleansing may primarily be about keeping records updated, but its importance goes beyond that. Consider these benefits:

Improved Productivity

Imagine all the hours that would be wasted if employees had to constantly search for the correct data in a messy database. Some teams don’t even have the time to spare! A clean, up-to-date dataset will help employees make sense of their data quickly and make more informed decisions faster. 

Improved Decision-making

Data can be a powerful tool when used correctly. But if you don’t have accurate information, your decisions will be based on erroneous information. Data cleansing ensures that all decision-makers are working with reliable data so that their choices are informed and sound. 

Increased Savings

The consequences of incomplete or incorrect data can be costly. By cleaning data, you can avoid making mistakes in the long run that could otherwise lead to wasted resources and money. For example, inaccurate customer data can result in businesses sending out marketing materials to the wrong people and may even lead to a loss of customers!

Better Customer Service

Accurate customer data is essential to acquiring new customers and retaining existing ones. With data cleansing, businesses can keep customer profiles up-to-date, which in turn helps them to provide better customer service. This is especially important for industries such as travel or hospitality, where customers expect a higher level of personalization.

Best Practices for Data Cleansing Strategy

Data cleansing is a process that should be done regularly to ensure accuracy and efficiency. But more importantly, it should be done the right way. Here are some best practices to follow:

  • Identify the data sources: Before beginning, identify all the data sources that need to be cleaned. These can include systems, databases, and spreadsheets.
  • Customize your cleaning process: Develop a custom cleaning plan based on your specific needs and the type of data you’re dealing with. For instance, if you have customer records, you may want to focus on verifying contact information or eliminating duplicate entries to maintain an updated customer list.
  • Automate where possible: Automation is critical to efficient data cleansing, as it allows you to quickly identify and fix errors without spending too much time on manual work.
  • Monitor data quality over time: Even after the initial cleansing process is complete, make sure you monitor the quality of your data over time to maintain accuracy and detect any new errors that may have crept into your dataset. 

Are There Any Data Cleansing Challenges?

Yes, there are. Data cleansing requires a systematic approach that can be time-consuming and costly. Businesses may have to manually go through millions of records to spot mistakes or inconsistencies. It is also challenging to integrate new datasets with existing ones if they do not share the same data structures.

Companies can use automated tools to help with the data cleansing process. These tools can quickly detect errors and inconsistencies and integrate new datasets into existing ones. However, some of these solutions are expensive and may require a certain level of expertise to operate correctly.

Fortunately, businesses can also outsource their data cleansing needs to third-party service providers. Some companies specialize in data processing and can efficiently clean up datasets so that you don’t have to worry about making mistakes or wasting time on mundane tasks. 

Start Data Cleansing Today

Data cleansing is essential for any business that wants to remain competitive and make informed decisions based on reliable information. By ensuring accurate data through regular cleaning, companies can reduce costs, improve customer service, and increase efficiency across the board.

Our professionals at prosperspark.com can help you set up a data cleansing process or define a data cleansing strategy that best fits your business needs. With our tools and services, you will be able to quickly identify and correct errors in your database and keep the data accurate and up-to-date. Contact us today to learn more about our data cleansing services.

In 2010, MI5, the United Kingdom’s domestic counterintelligence agency, made a grave mistake due to a simple spreadsheet formatting error. This blunder resulted in the wrongful surveillance of 134 individuals unrelated to ongoing investigations. On top of this, MI5 also collected the histories of 927 IP addresses without the required senior officer authorization. These mistakes wasted valuable resources and compromised the privacy of those involved. While this incident may sound like a far-fetched spy movie plot, it highlights the ongoing risks of manual data handling in critical operations.

 

The Spreadsheet Error That Led to Wrongful Surveillance

The error occurred during a data entry process where MI5 agents listed phone numbers for surveillance. Unfortunately, a formatting mistake in the Excel spreadsheet caused the last three digits of the phone numbers to be replaced with “000,” leading the agency to tap the wrong phone lines​.

As a result, MI5 unknowingly collected irrelevant data on unsuspecting British citizens. Although the error was discovered and the material destroyed, the incident is a chilling reminder of the consequences that can stem from even minor spreadsheet errors. However, it’s important to note that these errors were entirely preventable with the suitable systems in place, offering a sense of empowerment to organizations that can learn from MI5’s experience.

 

The Broader Risks of Manual Data Entry

The MI5 surveillance mistake is just one example of how spreadsheet errors can have significant implications, and it’s far from an isolated incident. In previous Spreadsheet Horrors blog posts, we’ve covered TransAlta’s $24 Million Copy-Paste Error and JPMorgan’s $6 Billion Trading Loss, both of which stemmed from errors in Excel spreadsheets. These examples from the finance and energy sectors further underscore how human data entry errors can spiral into severe operational failures​.

The risks of manual data entry are not just financial. For organizations like MI5, these errors can threaten national security and compromise public trust. Manual handling of large datasets—phone numbers, financial data, or operational details—carries a high risk of human error, especially when using spreadsheets that lack built-in safeguards.

 

Why Spreadsheets Are a Weak Link

Spreadsheets, while versatile, are prone to errors that can have devastating effects. MI5’s error is a classic case of how even a tiny mistake can lead to large-scale consequences. Spreadsheets cannot detect such errors in real-time, especially when the managed data is complex or critical.

 

Unauthorized Collection of IP Data

In addition to the phone number mistake, MI5 also acquired data on 927 IP addresses without the necessary approval from a senior officer. This unauthorized data collection resulted from a system configuration error that bypassed the established protocol requiring clearance from higher-ranking officials. Although this data request was deemed appropriate, the lack of proper authorization exposed MI5 to operational and legal risks.

These errors underscore the vulnerabilities of manual data management in high-stakes environments. Without proper safeguards, even well-established processes can go awry.

How ProsperSpark Can Help Your Company Prevent Similar Errors

At ProsperSpark, we specialize in helping organizations avoid costly data management mistakes like the ones MI5 experienced. By automating manual processes and implementing robust error detection systems, we enable businesses to handle sensitive data more efficiently and securely.

Automated Validation Rules

One of the critical ways ProsperSpark can help is by implementing automated validation rules. These rules ensure data is correctly formatted and verified before being used in critical operations. For example, in MI5’s case, validation rules could have checked the phone numbers for proper formatting before entering the system, catching the “000” error early. This type of automation drastically reduces the risk of human error in data entry, especially in scenarios where even minor mistakes can have significant consequences.

 Data Auditing and Logging Systems

At ProsperSpark, we also provide data auditing and logging solutions that track all changes made to sensitive datasets. By maintaining an audit trail, organizations can quickly identify and rectify errors. In MI5’s case, this would have allowed the agency to detect the phone number formatting issue and the unauthorized IP data collection before the errors impacted their operations. Data auditing ensures every action is logged and traceable, safeguarding against accidental errors and unauthorized changes.

Automated Workflows for Authorization

To prevent issues like MI5’s unauthorized IP data collection, ProsperSpark configures automated workflows that require the correct authorization at every stage of data handling. These workflows ensure that no action can be completed without the appropriate approval, reducing the risk of bypassing critical security protocols. For organizations dealing with sensitive information, having an automated authorization system is essential for maintaining compliance and avoiding potential legal repercussions.

Tailored Solutions for Data Management

Whether you’re handling sensitive data in intelligence, finance, healthcare, or any other industry, ProsperSpark can help implement tailored data management solutions designed to fit your organization’s specific needs. We provide customized automation solutions that eliminate the reliance on manual spreadsheets, reducing the risk of errors and improving overall operational efficiency.

 

Conclusion

MI5’s 2010 spreadsheet errors are a stark reminder of the risks associated with manual data entry, especially in sensitive operations. Organizations can significantly reduce the likelihood of such mistakes by implementing automated validation, data auditing, and authorization systems. ProsperSpark specializes in helping businesses transition from error-prone manual processes to secure, automated systems that ensure data accuracy and compliance.

 

Don’t let a simple formatting error compromise your operations. Contact ProsperSpark today to learn how we can help you safeguard your data with tailored automation solutions.

 

Keep Reading

MI5 responsible for 1000 bugging errors in 2010 says Guardian

MI5 makes 1,061 bugging errors

EuSPRIG Horror Stories

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