CLBB case studies
CLBB · Put your knowledge to work in context.
The Certified Lean Six Sigma Black Belt (CLBB) is a professional credential for practitioners who lead improvement projects end to end: scoping a problem with sponsors, building a measurement system, analyzing variation, piloting and standardizing a solution, and handing control to the process owner. It suits quality engineers, continuous improvement specialists, operations and manufacturing leaders, and analysts who already hold a Green Belt or comparable project experience and want to take on larger, cross-functional work with statistical depth. The CLBB case studies are 7 cases and about 6,261 words.
1The Deployment That Stalled at the Pilot Line
A mid-size automotive supplier has committed to a Lean Six Sigma deployment across four plants. Leadership chartered 12 Green Belt projects in Q1, but by Q3 only 3 are still active.
791 words, about 4 min2The Order-Entry Cycle Time Nobody Owns End to End
A distributor's order-to-cash process spans sales (order capture), credit (approval), warehouse (pick/pack), and billing. The customer-facing metric is 'order-to-ship' cycle time, currently averaging 6.2 days with a 95th percentile of 14 days.
836 words, about 4 min3The Belt Who Cannot Get the Team to Show Up
A Green Belt in a hospital's patient-access department is leading a project to reduce appointment no-shows (currently 18%). The team includes a front-desk supervisor, a scheduling-system analyst, two physicians, and a nurse manager.
852 words, about 4 min4The Project That Solved the Wrong Problem
A Lean Six Sigma team in a call center is chartered to 'reduce average handle time (AHT)' because AHT is 8% above the regional benchmark. The team builds a detailed process map, collects three weeks of data, and finds that AHT is driven mainly by calls about a recent billing-system change.
924 words, about 5 min5The Baseline That Was Too Good to Be True
A Black Belt is baselining defect rate on a stamped-parts line. The quality system reports 2.1% defects over the last quarter.
897 words, about 4 min6The Improvement That Made the Bottleneck Worse
A team is improving a three-step assembly process: Step A (cycle time 4.0 min), Step B (6.5 min), Step C (5.0 min). Demand is 7 units/hour; the line currently produces about 6.2 units/hour and uses overtime to meet demand.
1,009 words, about 5 min7The Control Plan That Nobody Follows
A project reduced invoice-processing errors from 9% to 2.5% by standardizing a verification step and adding a checklist. Six weeks after the control phase, an audit finds the error rate has drifted back to 6%.
952 words, about 5 min