Lean Six Sigma, a mix of Lean and Six Sigma, has become the latest buzzword in quality management. Lean stresses speed and waste and Six Sigma focuses on variance, faults, and process evaluation. Lean Six Sigma implementation should leverage Lean management and Six Sigma strengths. According to Juran, Lean Six Sigma requires improvement programs that satisfy stakeholders (1964).
The organizations responsible for implementation have individuals with and other belts who use the Lean Six Sigma project management approach (define-measure-analyze-improve-control) (DMAIC).
In the “analyze phase,” standard methods like cause and effect diagram (CED), why-why analysis, and tree diagram help identify the root cause(s). Data is collected and analyzed to determine a cause-and-effect link.
Tree diagrams show the logical connections between important events or specific goals, like in a failure tree analysis or a decision tree analysis. One event can trigger another, which can create others, creating a hierarchical relationship like a tree.
Tree diagrams can divide projects into activities using the work breakdown structure. Let us know the importance of Green Belt Certification and the usage of tree diagrams usage in Six Sigma.
What is a tree diagram? What is its origin?
Professor Shigeru Mizuno lists tree diagrams as one of the seven quality tools. Its original goal was to keep track of and make sense of all the steps needed to reach a goal. However, the tool’s versatility and power mean that it has applications beyond that.
An essential goal of Six Sigma is to satisfy the client’s needs. Faults are “anything not meeting the customer’s needs.” The goal is to identify the “causes” of these problems and eliminate them.
In other words, process performance is judged against internal standards rather than client needs.
Tree diagrams maintain the link between client requirements and process performance.
Tree diagrams: when to use them?
• When an issue is understood or addressed in broad generalities, you need to get precise, such as when defining logical steps to reach an objective.
• When creating actions for a solution or other plan
• Process analysis requires detail.
• Finding the fundamental cause of a problem
• When assessing implementation challenges for numerous options,
• After an affinity or interdependence diagram has shown significant difficulties,
• Explaining details to others
Tree diagrams are essential compared to many Six Sigma tools. However, experience shows that there are enough risks and benefits to justify putting together a few tried-and-true rules, tips for using them, and descriptions of subtle ways you can miss them.
Four hierarchical diagrams, or “trees,” are used in many Six Sigma projects:
• Cause-and-effect diagrams
• Y-to-x flow-down diagrams
• Functional analysis diagrams
• Abstraction diagrams (KJ or affinity)
Tree diagram usage in Six Sigma
If the cause-effect relationship is linear, you can use tree diagrams instead of the “five whys” technique in the scrap reduction study. Fault tree analysis is a changed tree diagram that adds up the chances of all real events and sub-events along the path between them. Sub-events cause this main event. Branching continues until the core event or cause is reached. Failure analysis uses the tree diagram the most.
Practitioners need help validating causes. You can use your experience to analyze building projects, logical reasoning, and production engineering’s basic causes by putting them in a causal order.
Some Lean Six Sigma systems use CED, logical explanations, and cause-and-effect matrices based on experts’ judgments to identify root causes.
Six Sigma Process – A real-world example
Billing procedures are assessed for errors, and Six Sigma Green belt certification tools are to enhance error processes and career goals to save healthcare expenditures.
• Define – The implementation team for a Six Sigma project must confront the difficulty of identifying the problem, defining its scope, and determining any actions you may perform to improve the situation at this phase.
• Measure- Measure the billing process by graphing the dollar amount for all treatments and patient tests conducted but not billed over several months. A process control chart shows the average monthly test cost. The Six Sigma Green Belt certification team can measure changes after their interventions.
• Systemic problems are not charged for in the Six Sigma Analysis phase. The team created a causal tree diagram. In contrasting colors, the failure’s cause. Cause-and-effect diagrams allow you to explore proximal causes, which you can target.
• Improvement – After identifying the reason for the unbilled medical service. An electronic ordering system for each application that requires doctors and laboratory workers to submit medical or procedure needs can improve clinical procedure documentation.
Lean six sigma green belt certification tools help healthcare providers discover billing procedures that require improvement. Maintain productivity gains with billing process interventions.
Why is Green belt certification needed?
Six Sigma green belt certification in quality management attests to mastery of the Six Sigma methodology and its application to improving business operations. With a Six Sigma green belt certification, you’ll get access to a process improvement methodology that you can utilize in many fields to boost productivity and quality. To gain a Six Sigma green belt certification, professionals must first receive training in the Six Sigma method and then pass an exam testing their knowledge of the approach.
Concluding words
To summarize, tree diagrams help depict the sequential, hierarchical relationships among various elements, such as events, goals, or tasks. You can use it to determine the relative importance of each “branch” by identifying the probabilities of the possible outcomes in specific contexts.
Simplilearn online learning platform brings hands-on, industry-specific training that uses real-world projects and simulations to ensure you are fully prepared to take on any challenge. The key to remember is to discover the root reasons before applying Lean Six Sigma.
You can reduce this “superfluous” view by giving Six Sigma or Lean Six Sigma practitioners the right training on hypothesis testing through Simplilearn.
The Green Belt certification course details the ideas behind Lean Six Sigma. The course material includes hands-on activities, multiple-choice tests, resource checklists, and real business scenarios. You can use these to learn all about Lean Six Sigma in detail.
