Companies typically follow a process to produce knitted sweaters, which includes design, material selection, knitting, finishing, and quality control. Here is a general overview of how companies make knitted sweaters:

Design: First, companies collaborate with designers to develop attractive and marketable sweater designs. Designers consider factors such as fashion trends, seasonal characteristics, target markets, and consumer preferences.

Material Selection: Choosing the right fabric and yarn is crucial for creating high-quality knitted sweaters. Companies select yarn that aligns with the design, such as wool, cashmere, cotton, linen, silk, and others. The quality and characteristics of the yarn directly impact the sweater's comfort, warmth, and appearance.

Knitting: Once the design and yarn are finalized, the knitting process begins. Companies can either produce the sweaters in-house or outsource the orders to specialized knitting factories. The knitting process typically involves the use of knitting machines or hand knitting. 

Knitting Machines: Using knitting machines allows for faster and more efficient production of large quantities of sweaters. The machines can automatically knit the yarn according to the design patterns and specifications. During knitting, the machine threads the yarn through the needles to create the knitted texture and structure.

Hand Knitting: Hand knitting is often employed for crafting special and intricate sweaters. Skilled knitters use knitting needles or crochet hooks to create complex patterns and textures stitch by stitch.

Finishing: After the knitting is complete, the sweaters undergo finishing processes to ensure their appearance and quality. Finishing steps may include:

Cutting: Separating the knitted sweaters from the knitting machines or tools to make them individual pieces.

Sewing: Performing necessary sewing and stitching to connect different parts and form complete sweaters.

Shaping: Giving the sweaters their intended shape and dimensions. This may involve steaming or heat treatments to ensure the sweaters remain flat and soft.

Quality Control: At each stage of sweater production, companies conduct quality checks. Quality control personnel inspect the stitching, yarn quality, accuracy of patterns, and any potential defects. This helps ensure that the final products meet the expected quality standards.

Packaging and Distribution: Once they pass quality inspection, the sweaters are packaged and prepared for shipment to retailers or direct sale to consumers. Packaging often involves folding or rolling the sweaters and placing them in plastic bags or boxes to protect them from damage and dust.

It's important to note that the above process provides a general overview of how knitted sweaters are made, and specific production procedures may vary depending on the company, product type, and manufacturing equipment. Additionally, companies need to ensure compliance with relevant regulations and industry standards.