Earlier reports had suggested 3,000 to 4,000 workers began striking at Foxconn's Zhengzhou complex on Friday afternoon — with the disputes apparently triggered by "over-exacting quality controls" on iPhone 5 production, compounded by a lack of worker training to meet the new, higher standards.
Exact quality control measures applied for each population are shown in Supplementary Material, Table S1.
Take a quality control manager.
As a further test of this conclusion, we used only rhesus-competent probes with data passing stringent quality control (exact match: N = 35,750; mismatch: N = 148,850; Methods) and investigated whether the rhesus-competent probes were capable of distinguishing between placental and fetal (heart and liver) tissues from five pregnancies.
Quality control must be exacting, he said, to assure that no bubbles remain in the material that can form voids, making the structure weaker, or other errors in curing the matrix.
SNP quality control measures included exact P-value for deviation from Hardy Weinberg equilibrium <10−10 and missing genotype rate >0.01 (MAF < 5%) or missing genotype rate >0.05 (MAF ≥ 5%).
As a quality control, we used Fisher's exact test on each list to estimate the enrichment of the known members of the functional group.
The main quality control problems are variable strength of natural rennin, no exact measurements (amount of rennin, temperatures, pH, and process times), and scarce sanitary conditions.
As this effect is difficult to simulate without knowing the exact bias, we decided to obtain an empirical error rate of pooled samples after using the quality control measures mentioned above: trimmed reads, sequencing quality, and minor allele count.
Raw read quality control and filtering used PRINSEQ (Schmieder and Edwards, 2011) with the following parameters: all exact sequence duplicates, reads with a mean quality Phred score below 30, and reads with more than one N were removed.
