Create designs

Know your target market

Budget for development (materials, patterns, fittings, fit model, etc.)

Make tech pack for designs

Choose your materials and order samples

Hire a pattern making professional

Hire a sample maker

Make as many corrections as necessary

Make sure your final sample is exactly what you want, because this is your contract with factories

Evaluate potential factories

Regarding turn time make sure you are on the same page as your factories/vendors

Determine your cost, using costing sheet to take everything into account

Create your budget for production and determine how you get your funding

Plan and order your materials for production

Have your production pattern and production sample

Pattern grading for sizing

Perform quality control on all materials

Have your fabric cut and your styles sewn and finished

Perform quality control inspections at the factory/vendor throughout the production process

Once approved, have styles packaged and shipped to customers