All the steps above disqualify options A to D, and the correct answer, therefore, is option E, increasing the number/model of styles produced.
S/Q stands for styling quality, and it refers to the appearance or style and quality of the materials used in creating a product. In improving the S/Q rating of a product at a particular plant, some of the steps to take would involve improving the quality of products used in creating the products.
Besides increasing the quality of materials used, increasing the expenditure for better styling, and training the plant staff will also improve the product S/Q rating.