CSSC MBB case studies
CSSC MBB · Put your knowledge to work in context.
The CSSC Certified Six Sigma Master Black Belt (CSSC-CSSMBB) is an advanced credential offered by The Council for Six Sigma Certification. It is designed for experienced Black Belts who have already earned the CSSC Six Sigma Black Belt Level III and have at least four years of experience executing Six Sigma projects in a Black Belt capacity. The certification requires passing a 150-question, open-book exam (multiple-choice and true/false) within four hours, achieving a score of 540 out of 600 points (90%). The exam covers the major sections of the CSSC Six Sigma Black Belt Body of Knowledge, with emphasis on the DMAIC or DMADV model, Six Sigma philosophies and principles, team leadership and dynamics, lean enterprise concepts, and identifying non-value-added activities. The CSSC MBB case studies are 5 cases and about 3,231 words.
1STAT Crossmatch Charter: Scope, CTQ, and Constraints
A regional blood bank's component lab chartered a Black Belt project to cut STAT crossmatch turnaround time from a baseline mean of 55 minutes to 30 minutes within 12 weeks. The sponsor wants all 14 hospital customers in scope.
664 words, about 3 min2Loan Cycle-Time Measurement System and Capability Study
A Black Belt is measuring cycle time for small-business loan applications. The primary metric is elapsed hours from application submission to credit decision.
632 words, about 3 min3Wire-Bond Failures: Confounded Shift, Machine, and Lot Effects
A semiconductor assembly line produces a plastic package with a 6-mil gold wire bond. Final test shows 4.2% pull-strength failures against a lower spec of 3.0 gf.
672 words, about 3 min4Coatings Adhesion DOE: Fraction, Blocks, and Confirmation
A coatings plant wants to increase adhesion strength (higher is better) and reduce variability. Five factors are considered: binder percentage (A), cure temperature (B), line speed (C), additive level (D), and humidity (E).
645 words, about 3 min5Weekly Cancellation Rate: Variable Limits and Phase Change
A subscription business monitors weekly cancellation rate among new subscribers. Weekly eligible base varies from 800 to 2,400 because marketing campaigns are uneven.
618 words, about 3 min