Jamison Kovach Supply Company manufactures paper clips and other office products. Although inexpensive, paper clips have provided the firm with a high margin of profitability. Sample size is $150.$ Results are given for the last $10$ samples.

Sample $1,2,3,4,5,6,7,8,9,10$

Defectives $4,7,3,6,12,6,4,4,1,11$

What type of control process is the best to monitor the process?