Test Sequencer

Executes custom, sequential test routines systematically to evaluate voltage, signal tolerances, and digital responses across hardware components under test.

Ensures high-throughput product reliability, standardizing assembly line diagnostics while logging execution telemetry to a centralized database.

01.THE CHALLENGE

Manual functional testing of electronic printed circuit boards (PCBs) was time-consuming, highly vulnerable to operator diagnostic errors, and lacked automated, standardized test data collection for manufacturing quality analytics.

02.THE SOLUTION

Developed a high-performance C# desktop application in .NET with WPF using the MVVM pattern. Built a multi-threaded sequence engine to control test fixtures via hardware protocols (Serial/USB), validate signal tolerances in real time, and persist structured pass/fail log data directly to a relational database.

03.ARCHITECTURE & DESIGN

• ▹MVVM (Model-View-ViewModel) architectural pattern for clean separation of UI components and hardware execution logic.
• ▹Multi-threaded execution engine enabling non-blocking asynchronous test execution and UI responsiveness.
• ▹Custom test sequence interpreter engine capable of processing step parameters, delay timers, and signal tolerance ranges.
• ▹Database persistence layer storing full telemetry logs, timestamps, operator IDs, and Device Under Test (DUT) serial numbers.

04.KEY FEATURES

• ⚡Customizable step-by-step test sequence execution engine with configurable pass/fail criteria.
• ⚡Hardware instrument integration via serial communication protocols for real-time telemetry acquisition.
• ⚡Interactive WPF graphical user interface with real-time test progress feedback and visual indicators.
• ⚡Automated production data logging to database storage for quality assurance analytics.

05.IMPACT & RESULTS

• ✦Drastically reduced cycle times per unit tested on the assembly line.
• ✦Standardized pass/fail criteria, eliminating operator bias and diagnostic errors.
• ✦Automated test logging and quality analytics in a centralized database.