Making Lean, Agile and Digital Twins Work in Custom Jobs

How a large-scale sign maker successfully implemented structured manufacturing systems.
March 4, 2026
4 min read

Key Highlights

  • Adopting agile scrum methodology allows for iterative development, early client feedback, and faster approvals, reducing rework in custom signage projects.
  • Digital twin technology provides virtual visualization of signs, improving accuracy, aligning teams and minimizing costly post-production changes.
  • 3D printing supports rapid prototyping of complex components, enabling testing and customization without significant waste or delays.
  • Lean manufacturing principles including value-stream mapping and 5S optimize workflows by reducing motion and transportation waste, leading to shorter lead times.
  • Applying Six Sigma techniques, including R&R studies, enhances precision in CNC operations, decreasing defects and ensuring better fit and finish.

The signage industry is not a typical candidate for structured manufacturing systems. It operates more like custom joinery than mass production—with every sign differing in size, design, material and specification. Yet over the years, I have successfully implemented agile project management, Industry 4.0 tools, lean manufacturing and Six Sigma practices to improve efficiency, quality and client satisfaction—even in this unpredictable environment.

Agile Project Management for Evolving Requirements

One of our most powerful shifts came from adopting agile methodology, specifically scrum, into our project management process. Our clients often begin with only a vague idea of what they want. Instead of rigid scopes and timelines, we introduced sprints—collaborative, iterative cycles where we co-develop concepts, mock-ups and final approvals.

We conduct client design stand-ups where feedback is gathered early and often. These brainstorming loops mirror agile sprints and help eliminate misunderstandings that typically arise late in traditional waterfall project-management setups. It has created a culture of rapid alignment, leading to faster approvals and reduced rework—a critical success factor in high-stakes, custom signage jobs.

Digital Twins for Visualization and Accuracy

We also implemented digital twin practices to show clients exactly what they would get before we begin fabrication. Using tools like AutoCAD, SketchUp and Solidworks, our design team builds full 3D models of signs and surrounding structures. This simulation enables accurate visualization of mounting points, lighting effects and even weather exposure.

Clients appreciate seeing their signage come to life virtually. Internally, it helps align production, installation and procurement teams. This virtual prototyping has drastically reduced approval times and prevented expensive post-production changes.

3D Printing and Additive Manufacturing in Prototyping

To support this digital design phase, we introduced 3D printing as part of our additive manufacturing toolkit. For complex signage components—like detailed logo parts, architectural letters or intricate mounts—we produce scaled-down prototypes or full-size printed elements using biodegradable (polylactic acid or PLA) and engineering (acrylonitrile butadiene styrene or ABS) thermoplastic materials.

This rapid prototyping gives both our clients and fabrication team tangible previews, helping us test assembly and finishing techniques in advance. In some cases, we have used 3D printing for permanent signage components, especially where weight, shape or precision constraints made traditional machining difficult or wasteful.

By combining digital design with physical modeling, we created a feedback loop that shortened decision cycles and enhanced customization without inflating costs.

Lean Manufacturing: Reducing Waste, Improving Flow

Once the design is finalized, lean manufacturing principles kick in. Although our products are custom, the processes behind them are repetitive—CNC routing, welding, painting, assembly.

We applied classic lean tools like value-stream mapping, 5S and kanban, but one of the most impactful changes came from tackling motion and transportation waste. By restructuring workstation layouts and relocating key machines (like CNC and laser cutters), we reduced unnecessary movement of materials and personnel, which directly cut down on production lead times.

Addressing the classic “TIMWOODS” wastes—transport, inventory, motion, waiting, overproduction, overprocessing, defects and skills—allowed us to create a more responsive and efficient production flow, even for one-off orders.

Six Sigma and R&R Studies for Precision Cutting

To further boost precision and reduce variation, we applied Six Sigma techniques, especially in our CNC cutting operations. We ran gage repeatability and reproducibility (R&R) studies—a statistical method to track measurement variability—on our CNC machines to evaluate how consistent the cuts were across different operators, materials, and setups.

The insights helped us recalibrate machine settings and standardize usage instructions. The result was a measurable reduction in dimensional variance and defect rates, which translated into fewer remakes, better fit-ups during installation and tighter delivery schedules.

Final Thought

Even in a craft-driven industry like signage, where every project is different, it is entirely possible—and beneficial—to implement selected tools from agile, lean, Six Sigma, and smart manufacturing. The key is knowing what to borrow, how to adapt, and when to apply—because excellence is not just for mass production anymore.

 

About the Author

Maher Hijazi

Operations Manager, Saudi Signs

Maher Hijazi is an experienced operations and manufacturing manager with over 19 years of leadership in fabrication, steel structures, HVAC, and signage. He holds certifications in PMP, RMP, CSM, and Lean Six Sigma Black Belt, with dual master’s degrees in mechanical engineering and business administration. 

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