01
Formula used
total material = net area × (1 + allowance/100)02
Worked example
For 30 m² and a 12% allowance, 3.60 m² is added. The theoretical order reaches 33.60 m² before rounding to complete boxes.
03
Common mistakes
- Automatically applying 10% to every geometry and pattern.
- Confusing cutting loss with a separate repair reserve.
- Not checking whether the layout creates unusable narrow strips.
- Rounding to boxes before applying the allowance.
04