Pattern grading is the process of producing patterns of different sizes from an original master pattern. Patterns are graded according to size charts showing average measurements for a population. There are three main grading methods: cut-and-spread, pattern shifting, and computer grading. Cut-and-spread involves literally cutting and spreading pattern pieces to enlarge or overlap to reduce. Pattern shifting moves the pattern up/down and left/right using a ruler. Computer grading is now most common, allowing patterns to be automatically enlarged or reduced according to predetermined grade rules stored in the computer.

1. DEPT: Textile engineering
BANGLADESH UNIVERSITY OF BUSINESS & TECHNOLOGY
Assignment on: Pattern Grading.
Course code : TXE-317
[Year]
Submitted by;
Md: Akash Hossain
12132107062
Intake:8
Sec:2

2. Pattern Grading
Pattern Grading is the process whereby patterns of different sizes are produced from
the original master pattern. This process can be performed manually or automatically by
a computerized system. Patterns are graded according to size charts which present the
sizes and the averagemeasurements of the population group for which the garments
are intended.
Garment Pattern Grading
Methods of Grading
There are three basic methods of grading: cut and spread, pattern shifting, and
computer grading. No one method is technically superior and all are equally capable of
producing a correct grade.

3. 01. Cut-and-spread method: The easiest method, which is the basis of the other two
methods, is to cut the pattern and spread the pieces by a specific amount to grade up,
or overlap them to grade down.
Cut-and-spread method
02. Pattern shifting: Pattern shifting is the process of increasing the overall dimensions
of a pattern by moving it a measured distance up and down and left and right, (using a
specially designed ruler) and redrawing the outline, to produce the same results as the
cut-and-spread method.
Pattern shifting
03. Computer grading: This is the fastest method, but tends to be an investment only
larger manufacturers can afford. However, sophisticated home computer software is
becoming affordable.

4. Computer grading
Today most manufacturers grade pattern on CAD systems. The pattern maker guides
a cursor around the edges of the sample pattern on a digitized table. At each of the key
points, he or she pushes a button to record a grade point. Each point is cross
referenced by a grade-rule table stored in the computer, which enlarges or reduces the
pattern automatically according to the predetermined direction. If the pattern was
originally made by computer, data are already in the computer and can be enlarged or
reduced automatically.

5. Basic block pattern for female
It is necessary to draw the Grade lines from where the grading is done. As from those
lines the increasing or the decreasing of measurements will be done.

6. Pattern line grading