solve the number 4 only

The table below shows the defects from Ajker garments factory. Defect type Total defects Skip stitch 2509 Loose thread 40 Misplaced embroidery 300 Needle damage 1287 Broken stitch 500 Puckering 569 Dirty spot 440 Open seam 290 Print defect 4509 Button missing 668 Label missing 1208 Components of the Group Project 1. Analysis of the current scenario (read Chapter 9 in advance) a. Clear usage of tools, included but not limited to, checksheet, pareto analysis 2. Identification of the main problem. Choose only one main problem to work with. (read Chapter 9 in advance) 3. Brainstorming to find out the root cause of the main problem using fishbone diagram (read Chapter 9 in advance) 4. Identification of the root cause of the main problem (read Chapter 9 in advance) a. clear display of hypothetical assumptions / scenario building