Decoupling SCADA: From Duplication to Architecture

Decoupling the Rectifier: How Architecture Saved a SCADA System from Data Duplication

The scada-coating project was facing a classic architectural mistake: rectifier programs were tightly coupled to technical cards (tech cards), creating unnecessary duplication whenever teams wanted to reuse a program across different processes. The goal was straightforward but ambitious—migrate the rectifier program data to an independent resource, reorganize the UI, and get buy-in from experts who understood the real pain points.

The task began with 20 pages of scattered user feedback that needed structure. Rather than diving straight into code, I organized every remark into logical categories: navigation flow, data model architecture, parameter display, validation workflows, and quality metrics. What emerged was revealing—several seemingly separate issues were actually symptoms of the same architectural problem. Users kept saying the same thing in different ways: “Give us rectifier programs as independent entities, not locked inside tech cards.”

The real breakthrough came from structured stakeholder engagement. Instead of guessing what mattered, I created a detailed implementation plan with effort estimates for each task—ranging from five-minute fixes to three-hour refactorings—and sorted them by priority (P0 through P3). Then I circled back to four different experts: a UX designer, a UI designer, a process technologist, and an analyst. This wasn’t just about getting checkmarks; it was about catching hidden domain knowledge before we shipped code.

One moment crystallized why this mattered. The technologist casually mentioned: “Don’t remove the coating thickness forecast—that’s critical for calculating the output coefficient.” We’d almost cut that feature, thinking it was legacy cruft. That single conversation saved us from a production disaster. This is why architectural work must involve people who understand the actual business process, not just the technical surface.

The implementation strategy involved decoupling rectifier programs from tech cards at the API level, making them reusable resources with independent versioning and validation. On the UI side, we replaced cramped horizontal parameter lists with a clean vertical layout—one parameter per row with tooltips. The Quality module got enhanced with full-text search and graph generation on demand, because operators were spending too much time manually digging through tables during production debugging.

What surprised me most was how willing the team was to embrace architectural refactoring once the plan was solid. Engineers often fear big changes, but when you show the reasoning—the duplication costs, the validation overhead, the reusability gains—the path becomes obvious. The work wasn’t heroic one-person rewrites; it was methodical, documented, and phased across sprints.

The deliverable was a 20-page structured document with categorized feedback, prioritized tasks, effort estimates, expert sign-offs, and five clarifying questions answered. The team now had a clear migration roadmap and, more importantly, alignment on why it mattered.

😄 Decoupling rectifier programs from tech cards is like a software divorce: painful at first, but you work twice as efficiently afterward.