EXIN LSSA Six Sigma Black Belt case studies
EXIN LSSA Six Sigma Black Belt · Put your knowledge to work in context.
The EXIN Lean Six Sigma Black Belt credential sits at the top of the Lean Six Sigma certification ladder. It is aimed at experienced improvement practitioners who already understand the DMAIC cycle and now need to lead complex, cross-functional projects, coach Green Belts, and handle the statistical and organisational demands of enterprise-level improvement work. Candidates typically come from quality, operations, engineering, supply chain, or continuous-improvement roles where they own project portfolios rather than single workstreams. The exam is structured around five equally weighted domains, each contributing roughly 20 percent: Lean Six Sigma fundamentals and deployment; Define; Measure; Analyze; and Improve and Control. The EXIN LSSA Six Sigma Black Belt case studies are 5 cases and about 3,404 words.
1Scaling a Six Sigma Deployment That Cannot Validate Its Own Savings
Vertex Molding launched a Six Sigma program 18 months ago. Two Black Belts and twelve Green Belts were trained.
645 words, about 3 min2A Warehouse Charter That Blames the Process and Misses the Customer
Northline Distribution's main warehouse ships about 9,000 orders per month. The VP of Operations chartered a project to reduce late shipments from 14% to 3% within six months.
745 words, about 4 min3A Capability Study Built on a Worn Gauge and One Cavity
A precision stamping cell produces a bearing seat with a print tolerance of 0.050 mm. The quality engineer reports Cpk = 1.45 from 120 parts collected over three days.
679 words, about 3 min4A Supplier Conclusion Confounded by Reactor, Season, and Temperature
A specialty chemical reactor produces a batch yield averaging 82%. The team compared two raw-material suppliers: 14 batches from supplier A averaged 84.1% and 12 from supplier B averaged 80.6%; a two-sample t-test gave p = 0.03.
656 words, about 3 min5A Pilot Improvement That Regressed After Rollout
A printed-circuit-board assembly line reduced solder defects from 4,200 ppm to 900 ppm during a three-week pilot using a new stencil aperture design and a revised reflow profile. After rollout to all three shifts, defects rose to 3,100 ppm within six weeks.
679 words, about 3 min