Lean Principles and Waste Flashcards
7 cards from real Lean Six Sigma Green Belt Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Lean Principles and Waste flashcards as text
Which Lean concept refers to leveling the production schedule to smooth out volume and mix variations over time?
Answer: Heijunka
Heijunka is the Lean practice of production leveling — distributing work evenly over time to avoid peaks and valleys that create waste and stress.
When a Green Belt calculates process efficiency on a value stream map, what ratio is being computed?
Answer: Value-added time divided by total lead time
Process efficiency (or process cycle efficiency) is the ratio of value-added time to total lead time, often expressed as a percentage to highlight waste.
A service team discovers they are entering the same customer data into three separate systems. Which waste type does this represent?
Answer: Over-processing
Redundant data entry across multiple systems is over-processing waste — performing more steps than necessary to deliver the required output.
Which of the following Lean principles must be established before a pull system can function effectively?
Answer: Create flow
Flow must be established before pull can work — without continuous, uninterrupted flow, downstream signals cannot reliably pace upstream production.
In a transactional process, which of the following is MOST likely classified as waiting waste?
Answer: A loan application sitting in a queue for 3 days awaiting underwriter review
A loan application sitting idle while awaiting review is classic waiting waste — work that is complete on one end but cannot proceed because a resource is unavailable.
Which statement BEST distinguishes 'muda' from 'mura' in Lean terminology?
Answer: Muda is waste; mura is unevenness or variation in workflow
Muda means waste (non-value-added activity), while mura refers to unevenness or irregularity in the flow of work, both of which Lean seeks to eliminate.
A team implements standard work instructions to ensure every operator performs a task the same way. Which Lean goal does this PRIMARILY support?
Answer: Reducing variation and establishing a baseline for continuous improvement
Standard work reduces process variation and creates a documented baseline from which kaizen improvements can be measured and sustained.