Ways to Ensure Quality Control in Tech Projects

𝗗𝗮𝘁𝗮 𝗤𝘂𝗮𝗹𝗶𝘁𝘆 𝗶𝘀𝗻'𝘁 𝗮 𝘀𝗶𝗻𝗴𝗹𝗲 𝗰𝗵𝗲𝗰𝗸 －it's a continuous contract enforced across the various data layers to avoid breakage. Think about it. Planes don’t just fall out of the sky when they land. Crashes happen when people miss the little signals that get brushed off or ignored. Same thing with data. Bad data doesn’t shout; it just drifts quietly—until your decisions hit the ground. When you bake quality checks into every layer and, actually use observability tools, You end up with data pipelines that hold up. Even when things get messy. That’s how you get data people can trust. Why does this matters? Bad data costs money → Failed ML models, wrong decisions. Good monitoring catches 90% of issues automatically. → Raw Materials (Ingestion)  • Inspect at the dock before accepting delivery.  • Check schemas match expectations. Validate formats are correct.  • Monitor stream lag and file completeness. Catch bad data early.  • Cost of fixing? Minimal here, expensive later.  • Spot problems as close to the source as you can. → Storage (Raw Layer)  • Verify inventory matches what you ordered.  • Confirm row counts and volumes look normal.  • Detect anomalies: sudden spikes signal upstream issues.  • Track metadata: schema changes, data freshness, partition balance.  • Raw data is your backup plan when things go sideways. → Processing (Transformation)  • Quality control during assembly is critical.  • Validate business rules during transformations. Test derived calculations.  • Check for data loss in joins. Monitor deduplication effectiveness.  • Statistical profiling reveals outliers and distribution shifts.  • Most data disasters start right here. → Packaging (Cleansed Data)  • Final inspection before shipping to warehouse.  • Ensure master data consistency across all sources.  • Validate privacy rules: PII masked, anonymization works.  • Verify referential integrity and temporal logic.  • Clean doesn’t always mean correct. Keep checking. → Distribution (Published Data)  • Quality assurance for customer-facing products.  • Check SLAs: freshness, availability, schema contracts met.  • Monitor aggregation accuracy in data marts.  • ML models: detect feature drift, prediction degradation.  • Dashboards: validate calculations match source data.  • Once data is published, you’re on the hook. → Cross-Cutting Layers (Force Multipliers)  • Metadata: rules, lineage, ownership, quality scores  • Monitoring: freshness, volume, anomalies, downtime  • Orchestration: dependencies, retries, SLAs  • Logs: failures, patterns, early warning signs Honestly, logs are gold. Don’t sleep on them. What's your job? Design checkpoints, not firefight data incidents. Quality is built in, not inspected in. Pipelines just 𝗺𝗼𝘃𝗲 data. Quality 𝗽𝗿𝗼𝘁𝗲𝗰𝘁𝘀 your decisions. Image Credits: Piotr Czarnas 𝘌𝘷𝘦𝘳𝘺 𝘭𝘢𝘺𝘦𝘳 𝘯𝘦𝘦𝘥𝘴 𝘪𝘯𝘴𝘱𝘦𝘤𝘵𝘪𝘰𝘯.  𝘚𝘬𝘪𝘱 𝘰𝘯𝘦, 𝘳𝘪𝘴𝘬 𝘦𝘷𝘦𝘳𝘺𝘵𝘩𝘪𝘯𝘨 𝘥𝘰𝘸𝘯𝘴𝘵𝘳𝘦𝘢𝘮.

Don’t Focus Too Much On Writing More Tests Too Soon 📌 Prioritize Quality over Quantity - Make sure the tests you have (and this can even be just a single test) are useful, well-written and trustworthy. Make them part of your build pipeline. Make sure you know who needs to act when the test(s) should fail. Make sure you know who should write the next test. 📌 Test Coverage Analysis: Regularly assess the coverage of your tests to ensure they adequately exercise all parts of the codebase. Tools like code coverage analysis can help identify areas where additional testing is needed. 📌 Code Reviews for Tests: Just like code changes, tests should undergo thorough code reviews to ensure their quality and effectiveness. This helps catch any issues or oversights in the testing logic before they are integrated into the codebase. 📌 Parameterized and Data-Driven Tests: Incorporate parameterized and data-driven testing techniques to increase the versatility and comprehensiveness of your tests. This allows you to test a wider range of scenarios with minimal additional effort. 📌 Test Stability Monitoring: Monitor the stability of your tests over time to detect any flakiness or reliability issues. Continuous monitoring can help identify and address any recurring problems, ensuring the ongoing trustworthiness of your test suite. 📌 Test Environment Isolation: Ensure that tests are run in isolated environments to minimize interference from external factors. This helps maintain consistency and reliability in test results, regardless of changes in the development or deployment environment. 📌 Test Result Reporting: Implement robust reporting mechanisms for test results, including detailed logs and notifications. This enables quick identification and resolution of any failures, improving the responsiveness and reliability of the testing process. 📌 Regression Testing: Integrate regression testing into your workflow to detect unintended side effects of code changes. Automated regression tests help ensure that existing functionality remains intact as the codebase evolves, enhancing overall trust in the system. 📌 Periodic Review and Refinement: Regularly review and refine your testing strategy based on feedback and lessons learned from previous testing cycles. This iterative approach helps continually improve the effectiveness and trustworthiness of your testing process.

I’ve lost count of projects that shipped gorgeous features but relied on messy data assets. The cost always surfaces later when inevitable firefights, expensive backfills, and credibility hits to the data team occur. This is a major reason why I argue we need to incentivize SWEs to treat data as a first-class citizen before they merge code. Here are five ways you can help SWEs make this happen: 1. Treat data as code, not exhaust Data is produced by code (regardless of whether you are the 1st party producer or ingesting from a 3rd party). Many software engineers have minimal visibility into how their logs are used (even the business-critical ones), so you need to make it easy for them to understand their impact. 2. Automate validation at commit time Data contracts enable checks during the CI/CD process when a data asset changes. A failing test should block the merge just like any unit test. Developers receive instant feedback instead of hearing their data team complain about the hundredth data issue with minimal context. 3. Challenge the "move fast and break things" mantra Traditional approaches often postpone quality and governance until after deployment, as shipping fast feels safer than debating data schemas at the outset. Instead, early negotiation shrinks rework, speeds onboarding, and keeps your pipeline clean when the feature's scope changes six months in. Having a data perspective when creating product requirement documents can be a huge unlock! 4. Embed quality checks into your pipeline Track DQ metrics such as null ratios, referential breaks, and out-of-range values on trend dashboards. Observability tools are great for this, but even a set of SQL queries that are triggered can provide value. 5. Don't boil the ocean; Focus on protecting tier 1 data assets first Your most critical but volatile data asset is your top candidate to try these approaches. Ideally, there should be meaningful change as your product or service evolves, but that change can lead to chaos. Making a case for mitigating risk for critical components is an effective way to make SWEs want to pay attention. If you want to fix a broken system, you start at the source of the problem and work your way forward. Not doing this is why so many data teams I talk to feel stuck. What’s one step your team can take to move data quality closer to SWEs? #data #swe #ai

TPM/Lean Toolbox : 7 Tools of QC Explained Popularized by Dr. Kaoru Ishikawa, the 7 Quality Control Tools are fundamental techniques used to identify, analyze, and solve quality-related issues. These tools are simple yet highly effective for improving production processes and ensuring consistent quality: 1.Cause-and-Effect Diagrams Identifies potential causes of a problem and organizes them into categories. Helps teams brainstorm and visually map out all possible root causes of an issue. 2.Check Sheets A structured, prepared form used to collect and analyze data systematically. Tracks the frequency of specific events or defects in a process. 3.Control Charts Monitors process stability over time by plotting data points against control limits. Identifies whether a process is in control or affected by special cause variations. 4.Histograms Graphically displays the frequency distribution of data. Shows patterns or trends in data, such as variability or skewness. 5.Pareto Charts A bar graph based on the 80/20 rule, showing which factors contribute most to a problem. Prioritizes the most significant issues for resolution. 6.Scatter Diagrams Displays the relationship between two variables to identify correlations. Determines whether changes in one variable affect another. 7.Flowcharts Maps out the steps in a process to visualize workflows and identify inefficiencies. Clarifies how processes operate and highlights areas for improvement. Digitalization Digital transformation is revolutionizing quality management by integrating advanced technologies into traditional QC tools, making them smarter, faster, and more reliable. 1.Cause-and-Effect Diagrams Use digital platforms like cloud-based collaboration tools (e.g., Miro, Lucidchart) to create interactive diagrams that teams can update in real time. 2.Check Sheets Replace paper with digital forms using mobile apps (e.g., Ideagen Smartforms). Automate data collection through IoT sensors for real-time analysis. 3.Control Charts Software like SPC tools integrated with IoT devices to monitor processes in real time and generate automated alerts when control limits are predicted to be breached. 4.Histograms Data visualization tools like Tableau or Power BI to create dynamic histograms that update automatically real-time. 5.Pareto Charts Cloud analytics platforms to generate Pareto charts automatically from large datasets, highlighting key issues instantly. Machine learning algorithms to predict which factors will likely contribute most to problems. 6.Scatter Diagrams Utilize software Minitab or Python analytics to create scatter plots with regression capabilities for deeper insights into variable relationships. 7.Flowcharts Process mapping tools like Visio or BPMN software integrated with workflow automation to create digital flowcharts that reflect real-time process status. These tools provide a structured approach to problem-solving, ensuring continuous improvement and customer satisfaction.

Leveraging the Pareto Principle to Optimize Quality Outcomes: 1. Identifying Core Issues: Conduct a thorough analysis of defect trends and recurring quality challenges. Prioritize the 20% of issues that account for 80% of quality failures, focusing efforts on resolving the most impactful problems. 2. Root Cause Analysis: Go beyond mere symptomatic observation and delve deeper into underlying causes using advanced tools such as the "Five Whys" and Fishbone Diagrams. Target the critical few root causes rather than dispersing resources on peripheral issues, ensuring a concentrated approach to problem resolution. 3. Process Optimization: Streamline operational workflows by pinpointing and addressing the most significant process inefficiencies. Apply Lean and Six Sigma methodologies to systematically eliminate waste and optimize processes, ensuring a more effective production cycle. 4. Supplier Performance Management: Identify the 20% of suppliers responsible for the majority of defects and operational disruptions. Enhance supplier oversight through rigorous audits, stricter compliance checks, and fostering closer collaboration to elevate overall product quality. 5. Targeted Training & Development: Tailor training programs to address the most prevalent quality challenges faced by frontline workers and engineers. Ensure that skill development efforts are focused on equipping teams to handle the most critical aspects of quality control, thus driving tangible improvements. 6. Robust Monitoring & Control Mechanisms: Utilize real-time data dashboards to closely monitor key performance indicators (KPIs) that have the highest impact on quality. Implement automated alert systems to detect and address critical deviations promptly, reducing response time and maintaining high standards of quality. 7. Commitment to Continuous Improvement: Cultivate a Kaizen mindset within the organization, where small, incremental improvements, focused on key areas, result in significant long-term gains. Leverage the Plan-Do-Check-Act (PDCA) cycle to facilitate ongoing, iterative process enhancements, driving continuous refinement of operations. 8. Integration of Customer Feedback: Systematically analyze customer feedback and complaints to identify recurring issues that significantly affect satisfaction. Prioritize improvements that directly address the most frequent customer concerns, ensuring that product enhancements align with consumer expectations. Maximizing Results through Focused Effort: By concentrating efforts on the critical 20% of factors that drive 80% of outcomes, organizations can significantly improve efficiency, reduce defect rates, and elevate customer satisfaction. This targeted approach allows for the optimal allocation of resources, fostering sustainable improvements across the quality process. Reflection and Engagement: Have you successfully applied the Pareto Principle in your quality management systems?

As a client project manager, I consistently found that offshore software development teams from major providers like Infosys, Accenture, IBM, and others delivered software that failed 1/3rd of our UAT tests after the provider's independent dedicated QA teams passed it. And when we got a fix back, it failed at the same rate, meaning some features cycled through Dev/QA/UAT ten times before they worked. I got to know some of the onshore technical leaders from these companies well enough for them to tell me confidentially that we were getting such poor quality because the offshore teams were full of junior developers who didn't know what they were doing and didn't use any modern software engineering practices like Test Driven Development. And their dedicated QA teams couldn't prevent these quality issues because they were full of junior testers who didn't know what they were doing, didn't automate tests and were ordered to test and pass everything quickly to avoid falling behind schedule. So, poor quality development and QA practices were built into the system development process, and independent QA teams didn't fix it. Independent dedicated QA teams are an outdated and costly approach to quality. It's like a car factory that consistently produces defect-ridden vehicles only to disassemble and fix them later. Instead of testing and fixing features at the end, we should build quality into the process from the start. Modern engineering teams do this by working in cross-functional teams. Teams that use test-driven development approaches to define testable requirements and continuously review, test, and integrate their work. This allows them to catch and address issues early, resulting in faster, more efficient, and higher-quality development. In modern engineering teams, QA specialists are quality champions. Their expertise strengthens the team’s ability to build robust systems, ensuring quality is integral to how the product is built from the outset. The old model, where testing is done after development, belongs in the past. Today, quality is everyone’s responsibility—not through role dilution but through shared accountability, collaboration, and modern engineering practices.

You can think what you want about Elon Musk. But his 5-step algorithm to cut bureaucracy at Tesla? It works for quality systems, too. (without breaking compliance) Here's how to apply it in Medtech: Step 1: Question every requirement Attach a name to every process step. If someone says "legal requires this," ask who specifically. Then ask: Does this actually add value, or is it just covering someone's back? The compliance check: Can you trace this requirement to ISO 13485, 21 CFR 820, or other relevant regulations and standards? If not, it's internal policy. Internal policy can change. Step 2: Delete what you can Delete aggressively. Don't do it stupidly, because we're treating patients. But you should feel slightly uncomfortable. Most quality processes have layers of "just in case" that nobody remembers why they exist. Before you delete, ask: Does this step contribute to product safety, traceability, or risk control? If yes, keep it. If not, cut it. Step 3: Simplify and optimize Only after steps 1 and 2. Don't waste time improving processes that shouldn't exist. I've seen teams spend months optimizing approval workflows that could've been deleted entirely. The quality view: Simplify how you meet the requirement, not whether you meet it. Example: You need a design review. You don't need 12 people in the room. Step 4: Accelerate cycle time Every process can move faster. But only speed up what survived the first three steps. The key here: Set clear timelines. Fast doesn't mean sloppy. Define what "complete" means upfront. Remove approval bottlenecks that add no value. Step 5: Automate last Not first. Automating broken processes just makes them fail faster. The challenge with all of this? Staying compliant. The answer? Most bureaucracy isn't regulatory. It's internal fear dressed up as compliance. ISO 13485 doesn't require 8 approval signatures. Your company does. Keep what protects patients. Cut the rest.