If repeated complaints come about colour fading in handicraft products, what is the most necessary improvement?

Correct answer: Colour-fastness testing and control of the dyeing process

Colour fading suggests a weakness in dyeing, dye fixing, washing, or drying. Colour-fastness testing checks whether the colour remains stable during washing, rubbing, or exposure to light, while control of the dyeing process corrects the cause during production. Final inspection alone can identify defective items but cannot prevent the defect from occurring. Exam tip: For repeated quality complaints, choose the option that combines testing with improvement of the root process.