YARIGAY Cycle

Introduction: YARIGAY Cycle

The YARIGAY Cycle is a structured approach to continuous improvement within Lean and Six Sigma methodologies. It represents the stages of Yokoten, Analyze, Realize, Improve, Guide, Apply, and Yell (Celebrate) — a practical evolution of the PDCA and DMAIC cycles that emphasises learning, sharing, and sustaining improvement across teams.

Background

The YARIGAY Cycle was developed as a modern framework to integrate both problem-solving and knowledge-sharing elements of Lean thinking. Unlike traditional improvement cycles that focus solely on process results, YARIGAY also highlights cultural growth, cross-functional learning, and celebration of success. The term “YARIGAY” combines key Lean concepts derived from Japanese management philosophy, reinforcing continuous improvement as both a technical and human process.

Key Elements/Features

• Yokoten (Share): Sharing best practices and lessons learned across departments to prevent repeated mistakes.
• Analyze: Identifying root causes of problems using data-driven tools such as Pareto charts, fishbone diagrams, and 5 Whys.
• Realize: Translating analysis into practical insights that clarify what must change.
• Improve: Implementing and testing new countermeasures through pilot runs or controlled experiments.
• Guide: Leading teams through the change process, ensuring alignment and ownership.
• Apply: Standardising successful solutions into daily operations, updating SOPs, and training staff.
• Yell (Celebrate): Recognising achievements, celebrating team success, and reinforcing positive behaviour to sustain momentum.

Applications/Examples

The YARIGAY Cycle is applied in Lean Six Sigma projects, Kaizen events, and cross-functional improvement programmes. For instance, a manufacturing team may use YARIGAY to reduce defects: analyse data, implement improvements, and share outcomes plant-wide through Yokoten. The “Yell” phase helps maintain morale and engagement after project completion.

Relevance/Impact

By combining analytical rigour with cultural reinforcement, the YARIGAY Cycle strengthens both performance and teamwork. It promotes sustainable improvement, transparency, and employee involvement — critical elements for achieving operational excellence in modern organisations.

See also

• Toyota Production System (TPS)
• Taiicho Ohno
• Kiichiro Toyoda
• Yokoten