Computer-Aided Design in Pattern Making: 7 Practical Steps for Faster, More Accurate Patterns

# Overview Garment teams facing short lead times shift pattern work to computer-aided systems to save time and increase precision. Computer-aided pattern workflows center on PDS (Pattern Design Software) and extend through pattern generation, digitizing, drafting, manipulation, grading, and preparing files for marker making.

# 1. PDS as the core of pattern making PDS is a 2D system that uses flat-pattern cutting techniques rather than 3D modeling for construction. It functions as a memory for tested pattern shapes and sizes, building a company library that can be reused and modified. Common PDS functions include copying patterns, cloning, joining pieces, changing outlines, repositioning pieces on-screen, and adding or omitting styling details such as darts and seams. Menu-driven interfaces use monitors or digitizer boards with a stylus for selection.

# 2. Pattern generation software Dedicated pattern generation systems like Conex (Assyst), PGS (Investronica), and 3D Modaris (Lectra) automate the creation of full size ranges. These systems require input such as size tables, alteration tables, and style-specific parameters (for example lapel width). Once populated, a full set of patterns across sizes can be generated in seconds and transferred into CAD for further work. 3D Modaris combines traditional tools with faster workflows for both new development and repeat production.

# 3. Pattern digitizing and scanning Scanning is generally faster than manual digitizing and can be more accurate for capturing pattern outlines. Modern scanners and digitizers produce rapid digital copies, even for complicated pieces. Effective digitizers capture tight curves, internal contours, and can assign piece attributes needed later for marker making. After digitizing, patterns enter the manipulation phase inside the CAD environment.

# 4. Pattern drafting and computer drafting tools Drafting on the computer—either by drafting directly in CAD or importing scanned patterns—lets teams copy, paste, and repeat blocks without re-tracing. Tools such as Adobe Illustrator are cited as user-friendly options for simplified drafting tasks. CAD drafting allows lines and curves to be measured to the millimeter, speeds up notch placement and matching, and improves repeatability when production becomes repetitive or lead times shrink.

# 5. Pattern manipulation and style adjustments Once patterns are in the system, blocks can be styled or existing styled patterns altered. PDS supports changing outlines, joining pieces, cloning, and interpreting new styles by adding or removing elements like seams and darts. These operations speed design iterations and standardize fit across collections by relying on stored, tested blocks.

# 6. Pattern grading with CAD

# 7. Preparing for marker making and production After drafting, manipulation, and grading, patterns need attributes assigned and positioning optimized for marker making. Digitizers and PDS environments support piece attributes and layout adjustments so patterns can be efficiently nested for cutting. The stored pattern library and standardized procedures reduce repetitive work on future orders.

# Bottom line Adopting CAD-based pattern workflows replaces slow, error-prone manual steps with repeatable, measurable processes. The practical advantages are faster turnaround, consistent sizing and fit, and reusable pattern libraries that shorten development and production cycles.