Support Green Belt projects with process thinking, basic problem-solving tools, data collection, and structured waste walks — contribute without owning the full DMAIC charter.
Yellow Belt is the capable team member. You help scope problems, map processes, collect data, run 5 Whys and fishbones, and join waste walks. A Green Belt (or Black Belt coach) usually owns the project charter and statistical decisions.
Typical depth: solid tool literacy and facilitation support — not full MSA, DOE, or hypothesis testing. You should leave Yellow able to fill a SIPOC, sketch a process map, and turn a “we think” into a checkable cause list.
Austin / Toyota training angle: Yellow Belts strengthen stand-up problem solving and give trainers a bench of people who can document work and spot muda systematically.
Go to the real place with a purpose. Observe, ask why, record wastes with evidence — not blame. Close the loop: who owns each finding?
Separate what the document says from what people actually do. Note cycle time, waits, rework loops, and handoffs.
Document the current best method: sequence, timing, key points, reasons. Yellow Belt contributes observations; Green Belt often owns the standard.
Error-proofing devices and process designs. Ask: can we make the wrong action impossible or immediately obvious?
Produce or move material only when the downstream signal says so. Spot push vs. pull on your line.
Know how to call for help, what escalation looks like, and why stopping briefly beats shipping defects.
Collect customer (or next-process) needs via interviews, complaints, specs, and observation. Sort into must-be vs. delight factors; draft CTQs that are measurable.
One-page project framing tool used in Define. Keeps scope honest: who supplies what, what the process is (high level), what leaves, who receives it.
Swimlanes or simple flowcharts: start/end, decisions, delays, rework. Yellow Belt maps “as-is”; Green Belt may add data boxes and VSM later.
Cause categories (often 6M: Man, Machine, Method, Material, Measurement, Mother Nature). Brainstorm, then verify — don’t treat the board as proof.
Drill from symptom to system cause. Stop when a countermeasure is actionable; watch for jumping to blame or stopping too early.
Know: population vs. sample, average vs. variation, that charts beat tables for spotting trends. You collect data; Green Belt selects tests and control charts.
Define-phase framing tool every project team should share.
Cause-and-effect structure for team brainstorms.
Vital-few prioritization with Pareto thinking.
Structured data collection for defect tallies.
Phase-by-phase tool map for DMAIC projects.
VOC methods that feed CTQs.
BoK orientation for Yellow Belt depth.
Exam-based Yellow Belt competency framing.
U.S. MEP lean services: VSM, 5S, changeover, continuous improvement for manufacturers.
Government primer on TWI and Job Instruction for manufacturers.
Lexicon primer on TWI J-programs and Job Instruction four steps.
Standardized work as the baseline for kaizen.
Practical Lean event / facilitator-oriented public kit.
Kaizen event framing from EPA Lean toolkit.
Free university course materials covering Lean and Six Sigma methods.
DMAIC and variation primer slides from MIT OCW.
Connects TPS house tools to Toyota Way people system.
Free self-study manuals by belt (some fetchers see 403; page is the known free-manual hub).