Data from the several production periods and the corresponding process parameters have been tabulated. The lot size for sampling is the same. What process parameters would you recommend for the next investigative stage? Provide your rationale. The goal is to reduce the defects to zero.
	glove functional defects	process parameters
date	Pinhole defects	ring roll defects	finger tip lumps	Mold temp	Total solid	Calcium nitrate	Acid conc.	Bleach conc.	leach tank temperature	latex pH
07-Jan	4	5	11	57	33.7	18.1	1.7	0.27	61	8.9
15-Jan	3	12	10	56	34.5	18.4	1.9	0.33	54	8.8
03-Feb	17	21	6	60	33.9	19.5	3.2	0.5	61	9
07-Feb	22	0	15	62	33.6	19.5	1.9	0.24	56	8.8
12-Feb	12	10	8	59	33.4	18.4	1.9	0.56	58	8.9
16-Feb	21	4	2	58	35	18.9	2	0.33	60	9.1
24-Feb	10	3	0	57	32.1	19.2	2.1	0.5	59	9.2
03-Mar	3	6	13	55	33.1	18.6	2.2	0.4	62	8.7
04-Mar	9	1	14	61	33.9	17.9	2.2	0.51	55	8.7
07-Mar	18	22	7	59	34	18.7	2.2	0.42	60	8.9
13-Mar	2	11	2	51	33.6	18.3	2.3	0.42	60	9.2
04-Apr	6	2	10	61	33.9	18.7	2.4	0.27	54	8.8
06-Apr	12	0	9	61	34.1	18.6	2.4	0.45	55	8.9
15-Apr	2	10	10	55	33.1	18.2	2.5	0.44	56	9
23-Apr	0	3	15	56	32.8	17.9	2.5	0.34	56	8.6
02-May	11	5	12	62	33.5	18.5	2.5	0.36	62	8.8
05-May	1	15	3	54	33.6	18.4	2.7	0.53	62	9.1
08-May	16	6	4	62	33.4	18.9	2.5	0.34	61	9.1
12-May	0	4	3	56	34.6	17.8	2.9	0.34	57	9.5
17-May	9	12	14	62	33.7	18.1	3.2	0.48	55	8.7