Requirements of Marker Planning: Three Constraints

Because fabric is about 60% of garment cost, the industry obsesses over marker planning: every scrap of fabric saved per garment is profit. But there is no single "solution" to a marker, only the most efficient arrangement within a set of constraints. To plan well you have to see the marker as a whole, at a glance, and work inside three constraint groups: the fabric, cutting quality, and production planning.

1. Nature of the fabric

The fabric restricts how you can lay pieces:

• Grain line. Every piece carries a grain line that must run parallel to the warp/wales (or weft/course if laid across). Ignore it and the finished garment hangs or drapes wrong. This limits the planner's freedom.
• Symmetry vs asymmetry. Symmetric fabric can be turned 180° and look the same (no special handling). Asymmetric fabric (e.g. pile) looks different when turned, so all pieces of a garment must lie the same direction, another restriction.
• Design characteristics. If a vertical stripe's repeat is not a perfect mirror, left and right sides may not mirror at the centre front line, so pieces must be placed on checks/stripes so the design matches when sewn.