EXIN LSSA Six Sigma Green Belt case studies
EXIN LSSA Six Sigma Green Belt · Put your knowledge to work in context.
This independent study page provides practice for EXIN LSSA Six Sigma Green Belt. Its editorial learning areas include Define; Measure; Analyze; Improve and Control. The questions develop subject knowledge and application through worked reasoning, distinctions between competing answers, and practical scenarios. Study the relevant guide before attempting a mixed set, then explain the evidence or calculation that supports each answer. Topics on this exam: Define, Measure, Analyze, and Improve and Control. The EXIN LSSA Six Sigma Green Belt case studies are 4 cases and about 2,845 words.
1A 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. The charter lists the team as the warehouse supervisor, a picking lead, and a Black Belt; it excludes IT, carrier management, and customer service. The problem statement says warehouse picks are slow and inaccurate and the goal says improve on-time shipping.
745 words, about 4 min2A 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. The team concluded supplier A is superior and proposed switching. A reviewer notices that supplier A batches were run mostly in Reactor 2 during summer, while supplier B batches were run in Reactor 1 during winter.
656 words, about 3 min3A 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. There is no control plan; the stencil is cleaned when operators remember; the reflow recipe is stored on a local PC and was edited twice by a technician; new operators received a five-minute verbal briefing. An X-bar-R chart was set up using pilot data with control limits calculated from the pilot, but the chart is reviewed only when a customer complains.
679 words, about 3 min4Rebaselining Picking Errors in a Distribution Center
The regional distribution center ships about 9,200 order lines a week across three shifts, with four pickers per shift. Packing reports a 1.8% picking error rate, up from 0.9% six months ago, and customer complaints have risen from 22 to 41 a month. The error log is kept by packing staff and records only defects caught before shipment; it has free-text entries such as 'wrong item', 'short', 'damaged' and 'missing', with no picker ID or shift. Pick lists are paper, and pickers batch 12 orders at a time across four aisles.
765 words, about 4 min