Question

DRESS Inc. is one of the newest clothing manufacturers located in Laguna. Their product lines include sandos, round neck shirts, fitted pants, v-neck shirts, wrap around skirt, and straight cur denims. Lately, the company has been experiencing a large number of rejects during the quality inspection at the finishing line. As the head of QC Department of the company, you were asked by the President to solve this alarming QC problem. The following are the data collected in the finishing section of the company. After inspection, a number of nonconformities were found in the production of 200 sandos. SUBGROUP # of loose threads a. Determine the [1] centerline, [2] upper control limit and [3] lower control limit. 1 2 3 45 6 7 8 9 10 11 12 13 14 5 5 6 7 10 6 5 12 13 7 6 4 2 10 b. does this production of sandos appear to exhibit statistical control with respect to the quality characteristics examined in this inspection?[4] Why?15]

Answer 1

0.080 0.070 0.060 0.050 defectives 0.040 CL 0.030 0.020 LCL 0.010 0.000 1 23 4 5 67 8 9 10 11 12 13 14 (b) This production process is in statistical control since the fraction defectives for all fourteen Subgroup are lies within control limits. Hence this production of Sandos appears to exhibit statistical control with respect to the quality characteristics examined in this inspection.