PECB Six Sigma Green Belt case studies
PECB Six Sigma Green Belt · Put your knowledge to work in context.
The PECB Six Sigma Green Belt is a professional certification offered by PECB (the Professional Evaluation and Certification Board), a certification body whose catalogue spans information security, privacy, risk, continuity, and quality and management topics. Six Sigma appears in PECB's Quality and Management training category alongside standards such as ISO 9001, ISO 13485, ISO/IEC 17025, ISO/IEC 20000, ISO 21502, ISO 28000, and ISO 55001. The PECB Six Sigma Green Belt case studies are 5 cases and about 4,827 words.
1Northline Distribution: rolling yield hides the rework cage
Northline Distribution fills about 4,200 orders a day through four sequential steps: pick, pack, label and manifest, and load. The operations manager reports 96% quality based on a weekly audit of 200 shipped orders that found 8 defects.
904 words, about 5 min2One Green Belt, four candidates at the plant steering committee
A plant steering committee must assign its only available Green Belt, at 0.5 FTE for 16 weeks, to one of four candidates. (A) Paint-line defects run at 3.1% and have been chronic for 18 months; cost of poor quality is estimated at 410,000 a year, root causes are unknown, and the process is stable and well instrumented.
1,042 words, about 5 min3Coating line: a marginal gauge asked to prove a demanding Cpk
A coating line applies a nominal 100 micrometre film with specification limits of 85 to 115 micrometres. Before running a capability study, a Green Belt runs a crossed Gage R&R: 10 parts, 3 operators, 3 trials per part, non-destructive gauge.
757 words, about 4 min4Cavity 2, a significant p-value, and a 65,000 dollar tool change
An injection-molded bracket has a bore diameter specified at 12.000 plus or minus 0.050 millimetres. A two-sample t-test compared 40 parts from cavity 1 and 40 from cavity 2: means 12.001 and 12.005 millimetres, p = 0.03, 95% confidence interval for the difference 0.0004 to 0.0086 millimetres.
1,023 words, about 5 min5Claims center: closing a project built on temporary inspection
A claims-processing center cut its error rate from 7.8% to 2.1% during a three-week pilot. Throughout the pilot the Belt personally audited 30 claims a day and a temporary reviewer checked all second-shift work; both stop when the project closes.
1,101 words, about 6 min