Lean Six Sigma White Belt Practice Questions
Prepare for LSSWB with more than an answer.
- Level
- Entry
- Valid for
- Lifetime
Domains covered on the exam 5
- Six Sigma Fundamentals20%
- Lean Principles25%
- DMAIC Methodology25%
- Roles and Responsibilities15%
- Basic Quality Tools15%
- 1
Which of the following are considered 'waste' according to Lean principles? (Select THREE)
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Correct answer: B, C, E
Inventory beyond what is immediately required ties up capital, requires storage space, and risks becoming obsolete. It is one of the classic 8 wastes.
This is the definition of Overproduction, often considered the worst type of waste because it leads to other wastes like excess inventory and transportation.
Rework is a direct result of the waste of Defects. It consumes time, materials, and labor to correct something that should have been done right the first time.
- 2
A core principle of Lean is the concept of 'Flow', which aims to have work progress steadily and smoothly without interruption. The following diagram shows four steps in a process with their processing times. Where is the primary bottleneck that disrupts flow?
flowchart TD A[Start] --> B(Step 1: 5 mins) B --> C(Step 2: 12 mins) C --> D(Step 3: 4 mins) D --> E(Step 4: 6 mins) E --> F[End]Show answer details
Correct answer: B
A bottleneck is the part of a process that has the lowest capacity or takes the longest time, thereby limiting the output of the entire system. In this workflow, Step 2 takes 12 minutes, which is significantly longer than any other step. This will cause work to pile up before it, disrupting the smooth flow of the process.
- 3
The Six Sigma methodology was originally developed in the 1980s with a focus on improving manufacturing quality at which company?
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Correct answer: C
Six Sigma was developed by engineer Bill Smith at Motorola in 1986. It was created as a data-driven, statistical approach to eliminate defects in their manufacturing processes.
- 4
An activity in a process is considered 'Value-Added' only if it meets three specific criteria. One criterion is that the customer must be willing to pay for the activity. What are the other two criteria?
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Correct answer: B
The three criteria for a value-added activity are: 1) The customer is willing to pay for it. 2) The activity must physically change or transform the product or service. 3) The activity must be done correctly the first time. Any step that fails to meet all three criteria is considered non-value-added.
- 5
The 'Analyze' phase of DMAIC is focused on identifying and verifying the root cause of a problem.
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Correct answer: A
The statement is true. After data is collected in the 'Measure' phase to understand the process performance, the 'Analyze' phase uses that data to drill down, identify potential root causes of the problem, and use facts and data to validate which causes are the most significant.
- 6
A hospital's patient discharge process is being reviewed. The team notes that nurses spend significant time walking back and forth between the patient's room, the pharmacy, and the billing office to gather paperwork. This unnecessary movement of personnel is a classic example of which of the 8 Wastes of Lean?
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Correct answer: B
The waste of Motion refers to any unnecessary movement of people that does not add value to the product or service. The nurses walking excessively to gather paperwork is a perfect example of this waste.
- 7
A software development team is holding a brainstorming session to identify potential causes for a high number of software bugs reported by users. A team member, who is a certified White Belt, suggests using a tool to visually organize these potential causes into categories like 'People', 'Process', 'Technology', and 'Environment'. Which foundational quality tool is being suggested?
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Correct answer: C
A Cause-and-Effect Diagram, also known as a Fishbone or Ishikawa diagram, is a brainstorming tool used to graphically organize potential causes of a problem into logical categories. This perfectly matches the White Belt's suggestion.
- 8
In the DMAIC framework, the primary objective of the 'Define' phase is to create a detailed statistical analysis of the process performance.
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Correct answer: B
The statement is false. The primary objective of the 'Define' phase is to establish the project's foundation by creating a problem statement, defining the scope, identifying goals, and securing stakeholder agreement, often captured in a Project Charter. Detailed statistical analysis of performance occurs later in the 'Measure' and 'Analyze' phases.
- 9
A project Champion has tasked a Green Belt with improving the on-time delivery rate for a logistics company. The Green Belt assembles a team that includes several drivers and dispatchers who have completed White Belt training. What is the most appropriate role for these White Belt certified team members during the project?
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Correct answer: C
This is the core role of a White Belt on a project team. They leverage their direct knowledge of the process to assist the project lead (Green Belt) by identifying problems, participating in brainstorming, and helping with basic data collection.
- 10
The concept of '3.4 Defects Per Million Opportunities' (DPMO) is a key performance metric in Six Sigma. This level of quality corresponds to a process that is operating at what percentage of perfection?
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Correct answer: B
A process achieving Six Sigma quality operates at 99.99966% accuracy, which mathematically results in 3.4 defects for every one million opportunities. This is the standard definition of a Six Sigma process.
