Lean Toolkit / 8-Step Problem Solving
8-Step Problem-Solving Process
The 8-Step Problem Solving Process is a structured Lean methodology for identifying root causes and resolving business problems permanently. Originally developed within Toyota, it’s the backbone of every LeanTeams improvement project — used in 15 of our published case studies across manufacturing, financial services, and professional services in Ireland.
Introduction to 8-Step Problem Solving
The 8-Step Problem-Solving Process is the backbone of every LeanTeams improvement project. It provides a structured, repeatable methodology that prevents teams from jumping to solutions before fully understanding the problem. It works equally well in a brewery, an accountancy firm, or a bank — because the thinking process is universal. Each step maps to the Plan–Do–Check–Act (PDCA) cycle: steps 1–5 are Plan, step 6 is Do, step 7 is Check, and step 8 is Act.
A structured path from problem to solution
Step 1 — Clarify the Problem
Define the problem clearly. What's happening? What should be happening? What's the gap? A well-defined problem statement is half the solution. Go to the gemba and observe the problem first-hand.
Step 2 — Understand the Current State
Map how things work today. Measure lead times, process times, and handovers. Use Value Stream Mapping to visualise the end-to-end flow. You can't improve what you haven't measured.
Step 3 — Set the Target
Set a specific, measurable target. Not "make it better" — a number, a timeframe, a clear goal the team can rally around. This becomes your benchmark for evaluating success.
Step 4 — Analyse the Root Cause
Don't fix symptoms. Use brainstorming, 5 Whys, fishbone diagrams, and Impact/Ease charts to find the real causes. This is where most teams rush — and where the 8-Step process delivers the biggest value.
Step 5 — Develop Countermeasures
Select solutions that address root causes, not symptoms. Prioritise by impact and ease of implementation. Quick wins build momentum and buy-in from the wider team.
Step 6 — Implement the Changes
Trial the changes. Start small, test, adjust. Assign clear ownership and timelines. No change happens without someone owning it. This is the Do phase of PDCA.
Step 7 — Evaluate the Results
Measure the results against your target. Did it work? What improved? What didn't? Compare before-and-after data honestly. This is the Check phase.
Step 8 — Standardise and Share
Document what works. Create standard work processes, train the team, and share learnings across the organisation. This is the foundation for the next improvement cycle.
How Irish businesses use 8-Step Problem Solving
Rye River Brewing
An employee used the 8-Step process to achieve 93% racking accuracy and eliminate €23,400 in annual waste — a 52% improvement in inventory cycle time.
View case study →Bereavement Payments
In a retail bank's bereavement unit, the 8-Step process cut payment clearing from 4 days to 1 — directly improving the experience for bereaved families.
View case study →Tracey Solicitors
The 8-Step approach helped streamline conveyancing admin — eliminating duplicate data entry and reducing cycle time by 40%.
View case study →Lean tools used alongside 8-Step Problem Solving
Common questions about 8-Step Problem Solving
What is the 8-Step Problem Solving Process?
The 8-Step Problem Solving Process (also called Toyota Business Practice or A3 Problem Solving) is a structured Lean methodology that guides teams through eight sequential stages: clarifying the problem, understanding the current state, setting a target, analysing root causes, developing countermeasures, implementing changes, evaluating results, and standardising the improved process. It maps directly to the PDCA (Plan–Do–Check–Act) cycle.
How is 8-Step Problem Solving different from DMAIC?
Both are structured improvement methodologies, but they differ in origin and emphasis. The 8-Step process comes from Toyota's Lean tradition and focuses on practical, hands-on problem solving with an emphasis on going to the gemba (where work happens). DMAIC (Define, Measure, Analyse, Improve, Control) comes from Six Sigma and tends to be more data-intensive and statistically driven. In practice, many of the tools overlap — the 8-Step approach is generally more accessible for frontline teams.
What tools are used in each step?
Common tools include: process mapping and Value Stream Mapping (steps 1–2), SMART goal setting (step 3), 5 Whys, fishbone/Ishikawa diagrams, and Impact/Ease charts (step 4), prioritisation matrices (step 5), pilot testing and Kaizen events (step 6), before-and-after data comparison (step 7), and standard work documentation (step 8). The specific tools depend on the problem — not every situation needs every tool.
How long does the 8-Step process take?
It depends on the complexity of the problem. A simple, localised issue might be resolved in a few days. A cross-functional business improvement project — like the ones completed in our Lean Practitioner programme — typically takes 6–8 weeks. The key is not speed but thoroughness: rushing through root cause analysis is the most common reason improvement efforts fail to stick.
Can the 8-Step process be used outside manufacturing?
Yes. While it originated in Toyota's manufacturing environment, the methodology works in any sector. LeanTeams has applied it successfully in financial services (bereavement payments processing), professional services (solicitors' conveyancing), food and beverage manufacturing, and public sector organisations. The thinking process is universal — if you have a process and a problem, the 8 steps apply.