We use computer-aided grading (CAD) to automatically adjust a base pattern to different sizes.
Here are the key steps in the automatic grading process:
- Creation of the base pattern: The base model is created in CAD software with all the dimensions and proportions of the reference size.
- Definition of grading rules: The designer inputs parameters such as size increments, grading ratios, and reference measurements for each size. These rules can be customized for each model or collection.
- Application of grading: The software automatically applies these rules and adjusts different parts of the pattern (length, width, armholes, etc.) according to the desired sizes.
- Verification and adjustments: Once grading is complete, the pattern is checked to ensure the garment’s proportions remain consistent across sizes. Manual adjustments may sometimes be necessary, but most of the work is done automatically.
Advantages of automatic grading:
- Time-saving: This process quickly generates different sizes of a model without redrawing each pattern by hand.
- Accuracy: The software applies precise mathematical calculations, reducing human errors in adjustments.
- Consistency: Automatic grading ensures uniform application of proportions across all sizes.
However, it is important to note that while this process is fast and accurate, it requires a good understanding of grading rules and the software tool used to avoid adjustment errors, especially in complex areas of the garment (such as curves or specific fitting zones).
